Construction of a point cloud FE model of the structure and its validity by static load tests
Yoshida Meiyo, Miyamori Yasunori, Kadota Takanori, Saito Takehiko
Journal of Structural Engineering, A, 70A, 414, 427, Japan Society of Civil Engineers, Mar. 2024, [Peer-reviewed], [Corresponding author]
Japanese, Scientific journal, In this study, an FE model of a structure was constructed by the extending algorithm for constructing point cloud FE models that the authors have studied. The point cloud FE model was built from dense point cloud data by box-grid downsampling of the point cloud, segmentation of structural parts, finding contour in each section, 2D Delaunay triangulation in the section, making solid elements by connecting triangles, reconnecting structural parts and exporting to a formatted file. Static loading tests for a removed railway bridge and a linear static analysis of the FE model were conducted to verify the method. The point cloud FE model provided quantitative structural stresses, and the experimental and analytical results generally agreed with each other at the location of maximum stresses., 40285956

Long-term investigations of dynamic behavior of a pre-stressed concrete ballasted railway bridge
Youqi Zhang, Yasunori Miyamori, Takanori Kadota, Takehiko Saito
Structures, 53, 822, 832, Elsevier BV, Jul. 2023, [Peer-reviewed]
English, Scientific journal, 40285959

A consideration of the jack-up bearing stiffener design method based on the jack-up reaction force
Takanori Kadota, Yasunori Miyamori, Takehiko Saito
Journal of Structural Engineering, A, 69A, 386, 394, Mar. 2023, [Peer-reviewed]
Japanese, Scientific journal

Inclination monitoring of a bridge pier in the winter season with high-sensitivity
Yasunori Miyamori, Yoichi Hinata, Yoshihito Imaizumi, Tomohisa Takehara, Shuichi Mikami, Toshiyuki Oshima
Proceedings of the 11th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII-11, SHMII-11_T11-03, Aug. 2022, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, International conference proceedings, 40290996

THE PSEUDO-DYNAMIC SIMULATION OF A SEISMIC ISOLATION BRIDGE ABOUT THE TEMPERATURE DEPENDENCE OF HIGH DAMPING RUBBER BEARINGS
SAITO Takehiko, MIYAMORI Yasunori, NAKAMURA Yasuyuki, TAKENOUCHI Kosuke, YAMAZAKI Nobuhiro
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 78, 4, I_468, I_477, Japan Society of Civil Engineers, 2022, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, In this study, in order to reflect the change of the hysteresis characteristic of the high damping rubber bearings to the seismic response, a pseudo-dynamic simulation system using experimental equipment capable of loading test at low temperature was developed. The pseudo-dynamic simulation system was developed by using open source UI-SIMCOR. To enhance the usability of the system, sub-program for static response analysis was also developed for the application of a versatile FEM software. As the results, it was possible to incorporate into the response analysis that the hysteresis loop of the bearing changed as the vibration progressed. And the nonlinear hysteresis characteristic of the pier bottom can be expressed.

Deep Learning for Information Triage on Twitter
Michal Ptaszynski, Fumito Masui, Yuuto Fukushima, Yuuto Oikawa, Hiroshi Hayakawa, Yasunori Miyamori, Kiyoshi Takahashi, Shunzo Kawajiri
Applied Sciences, 11, 14, 6340, 6340, {MDPI} {AG}, Jul. 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal, 0 Abstract: In this paper, we present a Deep Learning-based system for the support of information triaging on Twitter during emergency situations, such as disasters, or other influential events, such as political elections. The system is based on the assumption that a different type of information is required right after the event and some time after the event occurs. In a preliminary study, we analyze the language behavior of Twitter users during two kinds of influential events, namely, natural disasters and political elections. In the study, we analyze the credibility of information included by users in tweets in the above-mentioned situations, by classifying the information into two kinds: Primary Information (first-hand reports) and Secondary Information (second-hand reports, retweets, etc.). We also perform sentiment analysis of the data to check user attitudes toward the occurring events. Next, we present the structure of the system and compare a number of classifiers, including the proposed one based on Convolutional Neural Networks. Finally, we validate the system by performing an in-depth analysis of information obtained after a number of additional events, including an eruption of a Japanese volcano Ontake on 27 September 2014, as well as heavy rains and typhoons that occurred in 2020. We confirm that the methods works sufficiently well even when trained on data from nearly 10 years ago, which strongly suggests that the model is well-generalized and sufficiently grasps important aspects of each type of classified information.

A development of a hybrid remote safety monitoring system for scoured bridge substructures
Yasunori Miyamori, Yoichi Hinata, Yoshihito Imaizumi, Tomohisa Takehara, Shuichi Mikami, Toshiyuki Oshima
International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII, 2021-June, 1419, 1424, Jun. 2021, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, International conference proceedings, Recent changes in the global climate raise the risk of scouring under bridge piers or abutments in a cold region where the amount of rainfall is increasing. Bridges in such regions have rarely suffered from severe flood and then they have a smaller safety margin comparing to bridges in a warmer region. These cold regions are generally low population density that the investment for infrastructures is limited. On the other hand, the climate environment is much severe in the winter season. This situation requires much effort and innovation for improving structural health monitoring techniques. The low-cost and efficient monitoring network system saves people's life even if the structure itself damaged and the system improves the resilience of the local community. In this study, a remote inclination monitoring system with a high sensitivity MEMS sensor, and an LPWA network module was developed for safety monitoring of scoured bridges. The behavior of tilting substructure under scouring is also simulated to determine a warning threshold for examining the specification of the monitoring system. A typical RC abutment FE model with soil spring elements was modeled, and nonlinear static analysis performed in the simulated case of scour as deleting soil spring elements. Analytical results qualitatively agreed with the outdoor test in an experimental channel. The warning threshold of inclination and the required specification of the monitoring system are discussed from these results., 40290996

Structural health monitoring of the concrete barrier of a plate girder bridge by long term vibration monitoring with high-sensitivity MEMS accelerometers
Yasunori Miyamori, Takeshi Miyashita, Takuya Daigo, Akihiro Tomioka, Yuki Shibata, Masaji Yoshinaka, Takehiko Saito
International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII, 2021-June, 1737, 1741, Jun. 2021, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, International conference proceedings, The recent development of sensing devices for infrastructures enhances the possibility of vibration-based structural health monitoring (SHM) of civil infrastructures. The low-frequency signal is dominant in the vibration of the large-scale structures, and its small amplitude sometimes causes difficulty in measuring. Also, the sensor has enough durability for long-term monitoring in a severe environment. Therefore, the high-accuracy MEMS accelerometer was developed for structural health monitoring, and the accelerometers were installed on a plate girder bridge in the northern region of Japan. 24-hour vibration monitoring has been conducted for four years for practical SHM research. In this study, the monitoring system continuously measures acceleration and saves them every 10 minutes. The natural frequencies of four vibration modes are detected by the peak picking method, and there is a good correlation between its peak frequency and temperature. The frequency of the 4th mode increased after the repair work. We considered that its change is caused by an increase in the lateral bending stiffness of the concrete barrier. We expect those results are beneficial for the SHM of the concrete barrier of the bridge. Also, we consider it may have the potential of the detection for deterioration and damage of the structures.

Large-scale open-channel experiments on the collapse of abutment backfill owing to floods and proposed countermeasure
Shunzo Kawajiri, Kohei Onmayashiki, Yasuharu Watanabe, Tomoya Matsuda, Masaki Koyama, Yasunori Miyamori, Takayuki Kawaguchi
Journal of Japan Society of Civil Engineers, 9, 1, 125, 137, 2021, [Peer-reviewed], [International Magazine]
English, Scientific journal, In Japan, great damage to abutment backfills caused by large-scale floods occurs every year. It is necessary to examine the fundamental collapse mechanism on as close to full scale as possible, in order to achieve a sufficient effect of the similarity laws in geotechnical engineering, river engineering, and bridge engineering. In this study, geotechnical evaluations were carried out, such as observation of pore water pressure behavior in an embankment, settlement of an embankment crest, and applicability of a reinforced soil wall as a countermeasure construction, under conditions affected by flowing water. The results show that the collapse behavior of an embankment surface differs depending on the soil properties of the embankment material. The erosion of the river bed progressed even in the footing lower surface of the abutment foundation and in the upstream side of the abutment, where the flow velocity was locally large and changes in the flow direction were confirmed. In addition, when a gabion-reinforced earth wall with water permeability was used for the wall surface construction as a countermeasure, washout of the embankment in the abutment to the extent that a pavement surface above would collapse did not occur, thereby confirming the gabion's usefulness as a countermeasure.

Fundamental study on the structural health monitoring method to the pedestrian overpass with corrosion damage
Kadota Takanori, Miyamori Yasunori, Saito Takehiko, Shirakawa Yuta, Obata Takashi
Journal of Structural Engineering, A, 67A, 261, 272, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, Many pedestrian overpasses had been constructed based on the standard design and most of such bridges have been in service for over 50 years. These bridges often have corrosion damages at invisible members. Therefore, an efficient damage detection method as the structural health monitoring needs to be developed. In this study, a detailed finite element model was constructed to reproduce the bridge analytically and its vibration characteristics were compared to the measurement results. Furthermore, we investigated the effect of corrosion damage on the modal amplitude of the deck by using a finite element model. As a result of this investigation, it is basically possible to identify the damage location of the deck which by focused modal amplitude ratios of damaged conditions.

THE TECHNOLOGICAL TRENDS AND FUTURE CHALLENGES OF POINT CLOUD PROCESSING TECHNOLOGY FOR THE MAINTENANCE OF CIVIL STRUCTURES
KADOTA Takanori, MIYAMORI Yasunori
Intelligence, Informatics and Infrastructure, 2, J2, 333, 340, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Last author], [Domestic magazines]
Japanese, Scientific journal, There are numerous in-service structures in modern society, and establishing an efficient management scheme is an urgent issue for the sustainability of our life. The recent digital transformation technologies such as SfM and laser scanning are promising for obtaining detailed as-built information of structures. We investigated the 3D digital modeling techniques for the maintenance of infrastructures especially point cloud data. A literature review of practically used systems for infrastructural resilience management in Japan is conducted. Then, we discussed current challenges and prospects for introducing a 3D model in the maintenance engineering of structures. From the above studies, both laser scanning and structure from motion (SfM) techniques are commonly used to construct point cloud data. UAV and other mobile robot systems enhance the applicability for large-scale infrastructures. On the other hand, the cost of the system and handling large amounts of data are challenging issues, and transformation from the 3D model to structural analysis is also another issue to utilize such information in maintenance engineering.

Investigation of temperature effects on dynamic characteristics of a steel girder bridge by long-term monitoring
Yoshinaka Masaji, Miyamori Yasunori, Shibata Yuki, Daigo Takuya, Tomioka Akihiro, Miyashita Takeshi, Saito Takehiko
Journal of Structural Engineering, A, 67A, 183, 194, Japan Society of Civil Engineers, 2021, [Peer-reviewed], [Corresponding author], [Domestic magazines]
Japanese, Scientific journal, The long-term vibration monitoring of a steel girder bridge in the cold region was performed to investigate the temperature dependency on the dynamic characteristics of the bridge structure. The predominant frequency varied depending on the daily and seasonal fluctuation of the bridge temperature. A FE model with different elastic modulus based on each assumed temperature gave the natural vibration frequencies analytically. These natural frequencies have the same tendency with the measured result that means the main cause of the variation of the predominant frequency is the thermal dependencies of the elastic modulus of the structural members.

RESEARCH TRENDS IN MACHINE LEARNING FROM THE PERSPECTIVE OF DISASTER PREVENTION APPLICATIONS
MIYAMOTO Takashi, ASAKAWA Tadasu, KUBO Hisahiko, NOMURA Yasutoshi, MIYAMORI Yasunori
Intelligence, Informatics and Infrastructure, 1, J1, 242, 251, Japan Society of Civil Engineers, 11 Nov. 2020, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, In recent years, machine learning methods such as deep learning have evolved greatly in terms of performance, and they have been used for various purposes in disaster prevention. On the other hand, the intrinsic shortage of the number of data, the improvement of explanatory and interpretive nature of the task processing process are important issues that need to be addressed by computational models for decision making in disaster management. In this paper, we will discuss the concept, methods, and applications for addressing these two points based on research trends in the field of machine learning, and also introduce approaches that integrate mathematical and data-driven models to address these two issues.

EXPERIMENTS ABOUT THE TEMPERATURE DEPENDENCY OF HIGH DAMPING RUBBER BEARINGS DUE TO THE DIFFERENCES OF SHEAR STRAIN AND VERTICAL COMPRESSIVE STRESS
SAITO Takehiko, NAKAMURA Yasuyuki, TAKENOUCHI Kosuke, YAMAZAKI Nobuhiro, MIYAMORI Yasunori, YAMAZAKI Tomoyuki
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 76, 4, I_507, I_515, Japan Society of Civil Engineers, 2020, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, According to past researches, the mechanical characteristics of rubber bearings which used as seismic isolation devices in bridges depend on temperature. To use the devices in cold region, it is important to evaluate about the temperature dependency of the mechanical characteristics of rubber bearings. Therefore, this study discusses the mechanical characteristics of HDRBs by dynamic loading tests under the low temperature environment. Fundamental cyclic loading tests at different temperatures were conducted using 2 types of HDRBs (HDReX and HDR-S). The specimens were tested under shear deformation with a constant vertical compressive stress of 6MPa. Sine waves were applied in the horizontal direction to the specimens. The period of the sine wave was 2.0 sec, and the shear strain was 175%. In these tests, Equivalent stiffness and energy loss of all specimens increased under low temperature and its ratio depended on type of rubber. In the case of increasing shear strain, the temperature dependencies of the equivalent stiffness and energy loss were lower than the result of the fundamental tests. And in the case of decreasing vertical compressive stress, the temperature dependencies were equivalent to the fundamental tests.

Analytical investigation on bearing capacity of small steel girder bridge affected by corrosion damage at the end cross beam and stiffness decrease of RC slab
Iwabuchi Sunao, Miyamori Yasunori, Oshima Toshiyuki, Mikami Shuichi, Saito Takehiko
Journal of Structural Engineering, A, 66A, 48, 58, Japan Society of Civil Engineers, 2020, [Peer-reviewed], [Corresponding author]
Japanese, Scientific journal, Previous studies have investigated the load-distributing effect of deteriorated steel girder bridges. However, if end cross beams and an RC slab which can behave as load-distributing members have damage, the load-bearing capacity of the deteriorated bridges needs to be clarified. Thus the interactive load-bearing capacity and vertical displacement at bridge supports of a small H-beam bridge model were analyzed by using the finite displacement method in this study. The analytical result showed that the vertical load above the focused girder was distributed to the adjacent girders via the end cross beams and the RC slab even if the members had damage. However, the stiffness decreations of the end cross beams and the slab reduce the load-bearing capacity of the damaged girder end.

Investigation report of geotechnical disaster on river area due to typhoon landfall three times on Okhotsk region, Hokkaido, Japan
Shunzo Kawajiri, Takayuki Kawaguchi, Yasuharu Watanabe, Hiroshi Hayakawa, Yasunori Miyamori, Dai Nakamura, Satoshi Yamashita
SOILS AND FOUNDATIONS, 59, 3, 764, 782, JAPANESE GEOTECHNICAL SOC, Jun. 2019, [Peer-reviewed], [International Magazine]
English, Scientific journal, For one week from August 17 to 23, 2016, three consecutive typhoons made landfall in Hokkaido for the first time on record. These typhoons and the front they stimulated brought record-breaking torrential rain over the eastern part of Hokkaido. To investigate the damage to grounds and rivers resulting from this rainfall, the Japan Society of Civil Engineers (JSCE) and the Japanese Geotechnical Society (JGS) formed a disaster research group to conduct an investigation. This report provides the results of the investigation into damage to the grounds of areas along the Tokoro River of the Okhotsk region, Hokkaido, that suffered from this tremendous and diverse disaster. Specifically, the report describes the situation of the levees which were broken and eroded by the overflowing water, the shape of the levee bodies, the levee body soil properties examined by observation of the sections, as well as the occurrence of sand boiling and air blows. The washout of road embankments as well as damage to road bridge mounting fills and abutment backfills were also investigated. The investigation has demonstrated the need to clarify the resistance of the abutment backfills and levee bodies to flowing water as well as the geotechnical predominant factors in order to clarify the mechanisms behind erosion and washout, the need to review new measures that allow for the scale of sand boiling and resultant changes in levee body stability, and the fact that the existing embankments were able to temporarily suppress the flooding water which had spilled over from the river. Furthermore, although it has been identified that the findings of a study on an embankment washout associated with a tsunami can be applied to measures taken against the overflowing water, it has also been found necessary to clarify the predominant geotechnical factors using model tests and to use a more sophisticated analytical approach to establish a geotechnical stability review as soon as possible in order to prevent the levees and embankments from being eroded and washed out due to overflowing water. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.

Robustness analysis of a structural state identification method based on a 1-D convolutional neural network
Y. Zhang, Y. Miyamori, T. Saito, S. Mikami, T. Oshima
9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings, 1, 56, 61, 2019, [Peer-reviewed], [Corresponding author], [International Magazine]
English, International conference proceedings, In order to develop a method to identify invisible damage of structures, a vibration-based structural state identification method through a 1-D convolutional neural network (CNN) has been studied by the authors, and it already showed very high accuracy to identify tiny local structural state changes on a T-shaped steel beam if the structural states have been trained. However, the proposed classification CNN model has an obvious limitation that an accurate prediction of a CNN requires sufficient labeled training data in the identical category to the test data. Lacking of labeled training data in a certain structural state would directly cause the failure of prediction of the data in the certain structural state. For structural damage detection, establishing a database which contains the data in all the damaged structural states is impossible. Thus it is necessary to investigate the performance of the CNN to predict the data in untrained structural state cases. Then a regression CNN model was developed and the robustness analysis of the performance of a CNN-based structural state identification method was investigated on a T-shaped steel beam, by testing the capacity of detecting structural states in untrained categories. The results of the CNN predicting the data in untrained categories are shown and discussed., 40290995

Vibration test and FE analysis of dynamic characteristics of a PC beam with crack and temperature change
Y. Miyamori, D. Ogawa, K. Kamata, Y. Zhang, T. Saito, H. Choi, T. Oshima
9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings, 1, 314, 319, 2019, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, International conference proceedings, In this study, complex fluctuation of the dynamic characteristics of a simple structure was investigated using both vibration tests and numerical analyses. A pre-stressed concrete (PC) beam was placed outdoors, and its temperature changed from -10 to 30 °C. Vibration tests with accelerometers were repeated for a year. Cracks were introduced into the beam near one end of the beam at the next year in which measurement and vibration tests were conducted. The beam was also modeled using solid elements in finite element (FE) analysys software. The elastic module of the concrete was estimated by impact testing. Cracks were modeled by deleting elements along the major cracks, and the elastic module at the end of the beam was decreased to represent hairline cracks. From vibration tests and analyses, the natural frequencies were found to change 10 to 20% due to both temperature change and structural damage. On the other hand, the modal shape was slightly changed due only to structural damage. From these results it can be concluded that structural damage detection should be taken into account to complex environmental factors. Also, mode shape can be an indicator for locating structural damage.

IVESTIGATIING REPORT OF RIVER STRACTURE DAMEGE AT NORTHEN AND EASTERN HOKKAIDO DUE TO HEAVY RAINFALL, JULY 2019
KAWAJIRI Shunzo, WATANABE Yasuharu, MATSUDA Tomoya, ONMAYASHIKI Kohei, MIYAMORI Yasunori
Advances in River Engineering, 25, 85, 90, Japan Society of Civil Engineers, 2019, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, In Hokkaido, heavy rain in July 2018 was the largest flood since the heavy rain in Hokkaido in 2016. In small and medium-sized rivers in northern Hokkaido, damages such as breakage of levees and spillage of abutment back embankment occurred. In the eastern part of Hokkaido, a bridge spanning a first class river caused a subsidence of the bridge pier foundation.

This paper presents basic data that will contribute to future disaster prevention measures regarding the results of the survey of the damage status of river structures that occurred in the Hokkaido and Eastern regions due to torrential rains in July 2018.

AUTOMATED FE MODELING FROM 3D POINT CLOUD MODEL OF A DAMAGED STEEL STRUCTURAL MEMBER
SUZUKI Sanae, MIYAMORI Yasunori, SAITO Takehiko, YAMAZAKI Tomoyuki, DAMBIIBALJIR Munkhjargal, MIKAMI Shuichi
Journal of Japan Society of Civil Engineers, Ser. F3 (Civil Engineering Informatics), 75, 2, I_141, I_149, Japan Society of Civil Engineers, 2019, [Peer-reviewed], [Corresponding author], [Domestic magazines]
Japanese, Scientific journal, The recent development of the SfM technique is improving the efficiency of infrastructure management and quantitative evaluation of structural members using such technique is ongoing problems. In this paper, a dense point cloud model of a damaged T-shape steel structural member was constructed from still digital photographs. The 3D point cloud model was converted to an FE model by downsampling of the dense cloud in 3D lattice space and continuous 2D Delaunay triangulation of each section of the member. The reference FE model based on the measured dimension of the specimen was also composed. From comparisons among static loading test of the specimen, and FE analyses of both the point cloud FE model and the reference FE model. Fundamental availability of the FE modeling from SfM was confirmed that the distribution of stress in the web of the steel member consistent with the reference FE model. For the future study, the modeling accuracy of the thickness of the web plate in the point cloud FE model needs to be improved and the modeling algorithm is also modified to avoid defectiveness of solid elements., 40285958

Vibration-based structural state identification by a 1-dimensional convolutional neural network.
Youqi Zhang, Yasunori Miyamori, Shuichi Mikami, Takehiko Saito
Computer-Aided Civil and Infrastructure Engineering, 34, 9, 822, 839, Wiley, 2019, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, Deep learning has ushered in many breakthroughs in vision‐based detection via convolutional neural networks (CNNs), but the vibration‐based structural damage detection by CNN remains being refined. Thus, this study proposes a simple one‐dimensional CNN that detects tiny local structural stiffness and mass changes, and validates the proposed CNN on actual structures. Three independent acceleration databases are established based on a T‐shaped steel beam, a short steel girder bridge (in test field), and a long steel girder bridge (in service). The raw acceleration data are not pre‐processed and are directly used as the training and validation data. The well‐trained CNN almost perfectly identifies the locations of small local changes in the structural mass and stiffness, demonstrating the high sensitivity of the proposed simple CNN to tiny structural state changes in actual structures. The convolutional kernels and outputs of the convolutional and max pooling layers are visualized and discussed as well.

GEOTECHNICAL PROPERTIES AND OBSEARVATION OF EROSION PROCESS BY HYDRAULIC MODEL TEST OF BACK-FILL OF ABUTMENT
KAWAJIRI Shunzo, KAWAGUCHI Takayuki, WATANABE Yasuharu, MIYAMORI Yasunori, KAWAMATA Sakura, ONMAYASHIKI Kohei, KANEKO Taiki, TAKAHASHI Hiroki
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 74, 4, I_1273, I_1278, Japan Society of Civil Engineers, 2018, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, The back-fill of the abutment was eroded and a road collapse occurred due to Hokkaido heavy rain disaster in 2016. In this study, the geotechnical investigation was conducted to evaluate the properties of the back fill of the abutment. In addition, the open channel experiment was conducted to observe the basic erosion process of the back fill of the abutment during flowing water condition. Based on the results of the geotechnical investigation, the distribution of the S-wave velocity was different between the right bank and the left bank. From the results of the model test, the erosion of the embankment advanced at the boundary of the structure of the abutment and the embankment.

MECHANICAL CHARACTERISTICS OF HIGH DAMPING RUBBER BEARINGS BY DYNAMIC LOADING TESTS UNDER THE LOW TEMPERATURE ENVIRONMENT
SAITO Takehiko, IRIE Shunsuke, NAKAMURA Yasuyuki, TAKENOUCHI Kosuke, MIYAMORI Yasunori, YAMAZAKI Tomoyuki
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 74, 4, I_765, I_776, Japan Society of Civil Engineers, 2018, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, This study discusses the mechanical characteristics of high damping rubber bearings (HDRBs) by dynamic loading tests under the low temperature environment. Fundamental cyclic loading tests at different temperatures are conducted using 2 types of HDRBs (HDR-S and HDReX) and a natural rubber bearing (NR). In these tests, 175% shear strain of rubber thickness are given by loading facility in cold room. Equivalent stiffness of all specimens increase under low temperature and its ratio depends on type of rubber. Specially equivalent stiffness of HDR-S is significantly larger than other types because of its material characteristic. Internal temperatures of rubber bearings have linear relationship with energy loss. Gradients of the linear functions also depend on rubber type and ambient temperature. In cyclic loading tests under allowable design displacement (250%), the rate of change of the equivalent stiffness and energy loss of HDR-S significantly increase specially in −30°C. Finally, all specimens do not break under cyclic loading test of 120% allowable design displacement under any temperature cases.

REPORT ON THE FLOOD DISASTER IN TOKORO RIVER, AUGUST 2016
WATANABE Yasuharu, HAYAKAWA Hiroshi, KAWAGUCHI Takayuki, KAWAJIRI Shunzo, MIYAMORI Yasunori
Advances in River Engineering, 23, 31, 36, Japan Society of Civil Engineers, Jun. 2017, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, Several Typhoons attacked the Tokoro river basin in Hokkaido at August, 2016. The maximum rainfall amount for a month of this basin was recorded at this time. At the Futochanae observatory in the downstream part of the Tokoro river, the water level exceeded the design high-water level 4 times during the flood. Overtoppings of the flow happened at several parts around this area. Collapses of the bank arose in the tributaries of the Tokoro river. The river structures in the basin were damaged heavily. In order to grasp the cause of disaster of structures, observations were conducted from immediately after flood damage occurrence. Each cause of disaster is complicated and there was the necessity of synthesizing and examining the knowledge of not only river engineering. Field observation was conducted and the result which contributes to future disaster prevention was obtained from the viewpoint of river engineering, geotechnical engineering and bridge engineering.

Spectrogram analysis of local excitation method (LEM) for SHM improvement of damage detection
T. Oshima, Y. Miyamori, T. Yamazaki, S. Mikami, S. Yasue, Y. Hashidume
SHMII 2017 - 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Proceedings, 491, 500, 2017, [Peer-reviewed], [International Magazine]
English, International conference proceedings, A method of damage identification for civil infrastructures based on local excitation method (LEM) is dealt with in this paper. An algorithm through Local Excitation Method (LEM) (Beskhyroun, Oshima, Mikami et al. 2003, 2004, 2005, 2006, 2007, 2011, 2013) analyzing the change of PSD (Power Spectrum Density) on received acceleration signal of structure at each location, is used. Spectrogram analysis is applied to improve damage detection through LEM. Spectrogram analysis over time history of received acceleration signal helps the detailed analysis of PSD changes which may be the effect of local and small damages., 40285961

Effect of ballast state on dynamic parameters of a multispan ballasted prestressed concrete railway bridge
Y. Zhang, Y. Miyamori, T. Oshima, Y. Shirakawa, S. Mikami, T. Saito
SHMII 2017 - 8th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Proceedings, 625, 635, 2017, [Peer-reviewed], [Corresponding author], [International Magazine]
English, International conference proceedings, In this paper a phenomenon that the structural dynamic parameters of a multispan ballasted prestressed concrete railway bridge vary significantly according to the different ballast states is presented. In high latitude regions, the ballasts on the railway bridges would be frozen in winter annually owning to the repeated melting and freezing of snow when the temperature fluctuates near 0 °C. Based on the bridge dynamic experiment results and visual checks of ballast states in different seasons, a hypothesis was proposed that the state of ballasts could affect the structural stiffness of the bridge directly, and it was also assumed that a reasonable explanation of the seasonal variation of structural dynamic parameters exists. In order to prove the rationality of the above assumption, a high resolution finite element model was performed which was strictly associated with the real structure. The ballasts in frozen state were simulated by increasing the stiffness of the solid elements of the ballasts and the stiffness was assumed empirically considering to the high difficulty of field stiffness measurement of the frozen ballasts. The finite element model analysis result of the structural natural frequencies was in good agreement with the filed dynamic experiment result. Thus, the rationality of the hypothesis that the frozen ballasts could increase the structural stiffness and vary the dynamic parameters of the bridge was well evaluated. Meanwhile, the irregularity of damping ratio variations from the experimental results was also discussed. The nonuniform distribution of the ice and snow may be considered an acceptable explanation of this phenomenon., 40285959

Investigation of Seasonal Variations of Dynamic Characteristics of a Concrete Bridge by Employing a Wireless Acceleration Sensor Network System
Youqi Zhang, Yasunori Miyamori, Takanori Kadota, Takehiko Saito
SENSORS AND MATERIALS, 29, 2, 165, 178, MYU, SCIENTIFIC PUBLISHING DIVISION, 2017, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal, In this study, a fundamental application of a wireless acceleration sensor network system was carried out by conducting two bridge vibration experiments in autumn and winter. Seasonal effects on the dynamic characteristics of a multispan ballasted prestressed concrete railway bridge were investigated by employing a wireless acceleration sensor network system as a basic study of structural health monitoring technology. The dynamic parameters of every single span, such as natural frequencies, damping ratios, and mode shapes, were determined from free damped vibration, which was caused by human jumping excitation. Owning to the excitation pattern limitation, three modes were obtained in the experiments. A three-dimensional (3D) finite element (FE) model was made to show the rationality of the experimental result. Comparison of the autumn and winter experimental results showed that the natural frequencies of the bridge were significantly higher in winter than in autumn. The frozen ballast and frost on the deck and walkway were revealed to be reasonable explanations for this phenomenon. Meanwhile, the variations of damping ratios were not as simple as those of the natural frequencies. No variation regularity of damping ratios was obvious., 40285959

Dynamic characteristics of a damaged pedestrian overpass measured by wireless sensor array
Y. Miyamori, T. Kadota, Y. Zhang, S. Mikami
Transforming the Future of Infrastructure through Smarter Information - Proceedings of the International Conference on Smart Infrastructure and Construction, ICSIC 2016, 167, 172, 2016, [Invited], [International Magazine]
English, International conference proceedings, In this study, a fundamental attempt for structural health monitoring was performed on a damaged pedestrian overpass by using wireless sensor network system. The pedestrian overpass had local damage on its girder. The vibration measurement was repeated before and after the repair work of the girder with 14 Imote2 wireless sensors. Tri-Axial acceleration were measured by free damped vibration after human excitation. Natural frequencies, damping ratio and mode shapes of plural vibration mode were identified from measurement result. Its natural frequencies of each mode did not change by the repair work. Mode amplitudes were slightly changed in several vibration modes. A detailed finite element model was constructed to reproduce the bridge analytically and vibration characteristics were compared to the measurement results. In the model, every members including non-structural members were modeled. The structural damage was measured for repair designing and these damage was reproduced in the numerical model. Eigenvalue analysis and time history dynamic response analysis were conducted. A detailed FE model could reproduce the actual bridge. The error of natural frequencies were 4% at maximum up to 6th mode. However changes of natural frequencies and modal shape by repair work were not fully corresponded. In certain analytical case, dynamic response was changed at the damage location. However simulation results were not fully corresponded with the vibration experiment. The modeling error were need to be examined in the future study., 40285960

STUDY ON THE EFFECTS OF THE DIFFERENCES IN EVACUATION CONDITIONS ON TSUNAMI EVACUATION RANGE OF REFUGES IN KUSHIRO LOW-LYING AREA
SAITO Takehiko, SHIMIZU Toshiaki, MIYAMORI Yasunori
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 72, 4, I_569, I_579, Japan Society of Civil Engineers, 2016, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, This study discusses evacuation planning from tsunami disasters due to the difference in evacuation conditions at the low-lying area in Kushiro City. A series of surveys and GIS analyses were carried out in previous studies. In snowy and cold district in winter, a range of refuge for tsunami evacuation decreases because of the decrease of walking speed and impossible to stay outdoors. If it is possible that the early evacuation and more people take in temporary refuges, this range of refuge increases significantly. Therefore, we estimate the effects of travel time to refuge buildings. The result shows that it is difficult to evacuate by the early evacuation only in some areas. Therefore, temporary refuges need to be constructed in such area.

Study on the changes of the modal amplitude by repair work of a pedestrian bridge with real damage
門田 峰典, 宮森 保紀, 綿崎 良祐
構造工学論文集. A, 61, 143, 152, 土木学会, Mar. 2015, [Peer-reviewed], [Corresponding author], [Domestic magazines]
Japanese, Scientific journal, In this study, we conduct fundamental study of structural health monitoring based on changes of modal amplitude. The free damped vibration of a pedestrian bridge is measured by using 3D wireless acceleration sensors. The pedestrian bridge has local damage on its girder. The vibration measurement is repeated after the repair work of the girder. From measurement results, natural frequencies of each mode don't change by repair work. Modal amplitudes are changed in several vibration modes. COMAC method is applied to discuss the effect of modal amplitude changes and the change of COMAC is larger on the nearest point of the damage., 40285960

Structural vibration characteristics of a pedestrian bridge by the 3D acceleration sensing of smart sensors and detailed 3D-FEM model
Takanori Kadota, Yasunori Miyamori, Ryosuke Watasaki, Shuichi Mikami, Takeliiko Saito
IABSE Conference, Nara 2015: Elegance in Structures - Report, 308, 309, 2015, [Peer-reviewed], [Corresponding author], [International Magazine]
English, International conference proceedings, In this study, we conducted fundamental study of structural health monitoring (SHM) by using 3- dimensional acceleration measurement and high resolution FE model analysis of a simple pedestrian overpass having an actual damage. Vibration measurement is performed on the pedestrian bridge by using Imote2 smart sensors. Plural vibration modes are identified from damped free vibration experiments. To reproduce the measured vibration characteristics with satisfactory accuracy for SHM in the analytical model, it is necessary to appropriately model the boundary conditions and secondary members. In this study, modelling of connecting part of main girder and stairs is examined in several patterns. Then, appropriate method of detailed FE modelling is discussed by comparing natural vibration characteristics from eigenvalue analysis., 40285960

Numerical simulation of Local Excitation Method (LEM) to detect small defect of structure for structural health monitoring
T. Oshima, Y. Miyamori, S. Mikami, T. Yamazaki, S. Beskhyroun
SHMII 2015 - 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure, 2015, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, International conference proceedings, By using piezoelectric actuator real bridge can be accelerated locally to detect the effect of small damage like fatigue crack as a response change of vibration. Power spectrum density (PSD) function of the response can give us the indication of existence of damage after the damage occurrence. Detail analysis of PSD before and after the damage can give us the information of location and size (area) of the damage. Numerical simulation can be used to show how we can detect the damage of structure. Paper shows the result of numerical analysis of damage detection in case of beam structures., 40285961

Early damage localization of steel structures based on changes of modal amplitude
Y. Miyamori, N. Kouso, S. Mikami, T. Oshima, T. Kadota, T. Saito
SHMII 2015 - 7th International Conference on Structural Health Monitoring of Intelligent Infrastructure, 2015, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
English, International conference proceedings, Management of structural systems would be significantly improved if structural damage could be found by monitoring in the early stages. However, early damage often occurs in difficult-to-see areas such as joints. Vibration-based SHM has been researched as a way to assess damage by comparing past and present vibration characteristics. It is thought that the location of damage could be identified early and accurately using these objective parameters. This study presents a structural damage detection method based on changes in amplitude of vibration modes. In a steel structure model, a minimal reduction in plate thickness in a local part is introduced as structural damage. Modal amplitudes are obtained from vibration tests in intact and damaged structural models. Modal amplitude differences at each node are summed up in multiple vibration modes, and the calculated value is defined as a damage index. The index shows the largest value at the region of damage, because the flexibility of the damaged member increases. Modal amplitudes are affected in plural modes, which have a bulge near the point of damage. Eigenvalue analysis of FE models is also performed to compare the results of the vibration test., 40285961

Damage detection at multiple locations in reinforced concrete structures using algorithm based on transfer function estimate
P. Rathish Kumar, Toshiyuki Oshima, Shuichi Mikami, Yasunouri Miyamouri
Indian Concrete Journal, 88, 8, 33, 43, Aug. 2014, [Peer-reviewed], [Last author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, This paper deals with damage detection and localization in a reinforced concrete structure based on vibration based monitoring. The sensing system adopted in this study uses the piezoelectric accelerometer to detect, locate and estimate defects induced in the form of cracks on the beam at different locations. The piezoelectric actuator provides variable excitations in the frequency range of 0-800 Hz that is effective in measuring a high order mode change associated with the occurrence of damage. In this paper, a damage identification method based on changes in Transfer Function Estimate (TFE) is presented. The method can be used to accurately detect damage, predict its location and assess the extent of damage in structures., 40285960

A Study of Tsunami Evacuation with Consideration for Damage to Tall Buildings in Kushiro City
SAITO Takehiko, MURAMOTO Honoka, MIYAMORI Yasunori, MIYAMORI Yasunori
Journal of Social Safety Science, 24, 22/24, 151, 159, Institute of Social Safety Science, 2014, [Peer-reviewed], [Last author], [Domestic magazines]
Japanese, Scientific journal, This study discusses evacuation planning from tsunami disasters at the low-lying area in Kushiro City by using existing tall buildings as temporal refuges. Serviceability of refuges is influenced by damage to buildings due to seismic ground motions. We estimate the damage to the buildings using a fragility function. In the worst case, the coverage area of evacuation decreases by 80% because of the damage to tall buildings. And the variability of coverage area in the histogram shows that the means value approximately coincides with the mode.

A VIBRATION-BASED STRUCTURAL IDENTIFICATION OF A PEDESTRIAN BRIDGE BY 3D SMART ACCELERATION SENSORS AND HIGH RESOLUTION FE MODEL
KADOTA Takanori, MIYAMORI Yasunori, OKAMOTO Akito, WATASAKI Ryosuke, MIKAMI Shuichi, SAITO Takehiko
Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)), 70, 2, I_887, I_897, Japan Society of Civil Engineers, 2014, [Peer-reviewed], [Corresponding author], [Domestic magazines]
Japanese, Scientific journal, In this study, we conducted fundamental study of structural health monitoring by using 3D smart acceleration sensors and high resolution FE model of a pedestrian bridge.Vibration measurement is performed at a pedestrian bridge having an actual damage by using Imote2 smart sensors. Several vibration modes are identified and compared to eigenvalue analysis of detailed FE model. In FE modeling, stairs restrain girders of the pedestrian bridge and its modal shapes are affected by the connection between stairs and girders. Vibration characteristics of updated FE model are improved in both natural frequencies and mode shapes.

Small damage detection of real steel bridge by using local excitation method
Toshiyuki Oshima, Yasunori Miyamori, Shuichi Mikami, Tomoyuki Yamazaki, Sherif Beskhyroun, Maria Fabijanska Kopacz
Journal of Civil Structural Health Monitoring, 3, 4, 307, 315, SPRINGER HEIDELBERG, Dec. 2013, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, By using a piezoelectric actuator, a real steel bridge can be accelerated locally to detect the effect of small damage like fatigue crack and connection damage as a response to change of vibration. Power spectrum density (PSD) function of the response can give us the indication of the extent of damage before and after the damage. Detailed analysis of PSD before and after damage can give us the location and size (area) of damage. This paper shows the experimental result of damage detection by using local excitation method on a real bridge. © 2013 Springer-Verlag Berlin Heidelberg.

Assessment of vibration-based damage identification techniques using localized excitation source
Sherif Beskhyroun, Toshiyuki Oshima, Shuichi Mikami, Yasunori Miyamori
Journal of Civil Structural Health Monitoring, 3, 3, 207, 223, SPRINGER HEIDELBERG, Aug. 2013, [Peer-reviewed], [International Magazine]
English, Scientific journal, The Bridge Engineering Laboratory in Kitami Institute of Technology, Japan has introduced a number of different damage identification techniques to detect structural damage and identify its location utilizing piezoelectric actuators as a localized excitation source. Several spectral functions, such as cross spectral density, power spectral density, phase angle and transfer function estimate, were used to estimate the dynamic response of the structure. Each function's magnitude, measured in a specified frequency range, is used in the damage identification methods. The change of the spectral function magnitude between the baseline state and the current state is then used to identify the location of possible damage in the structure. It is then necessary to determine which spectral function is best able to estimate the dynamic response and which algorithm is best able to identify the damage. The first part of this paper compares the performance of different spectral functions when their magnitude is used in one damage identification algorithm using experimental data from a railway steel bridge. The second part of this paper compares the performance of different damage identification algorithms using the same data. © 2013 Springer-Verlag Berlin Heidelberg.

Numerical analysis of small defect detection of beam by using lacal excitation method
Miyamori Yasunori, Oshima Toshiyuki, Mikami Shuichi, Yamazaki Tomoyuki, Takahashi Toru
構造工学論文集 Ａ, 59, 311, 319, 公益社団法人 土木学会, Mar. 2013, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal, By using piezoelectric actuator bridge can be accelerated locally to detect theeffect of small damage like fatigue crack as a response change of vibration.Transfer function (TF) of the vibration response can give us the indication ofexistence of damage before and after the damage. Detail analysis of TF beforeand after damage can inform us location and size (area) of damage. This papershows the result of numerical analysis of damage detection on beam member byusing local force excitation method.

Basic study on damage localization of steel bridges based on the changes of modal amplitude
N. Kouso, Y. Miyamori, S. Mikami, T. Oshima, T. Saito
Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, 2013, [Corresponding author], [International Magazine]
English, International conference proceedings, "Structural Health Monitoring (SHM)" attracts interest in infra management. SHM aims real time monitoring of structural integrity. It is effective if the structural damage could be found by the monitoring in early stage of deterioration. However, early damage grows in difficult to see members such as joint. The vibration-based SHM has been researched that the way to assess the damage by comparing the vibration characteristics between the past and present state. It is expected that position of damage could be found early and accurately by using these objective parameters. This paper presents structural damage detection method based on changes in amplitude of vibration modes. Structural slight damage is considered as minimal reduction of plate thickness on a local part. Modal amplitude differences between undamaged state and damaged state at each node are summed up in multiple vibration modes. And the calculated value is defined as a damage index. The index shows the biggest value at the region of damage because the flexibility of damaged member increases and modal amplitudes are affected in plural modes which have a bulge near damaged point. As a basic study, two damage scenarios are considered at the connection between main girder and crossbeam. From eigenvalue analysis, the proposed method is able to locate damages. And a smaller damage can be detected more accurately., 40285962

Application of smart sensors for bridge vibration measurement under low temperature environment
A. Okamoto, R. Watasaki, K. Pan, Y. Miyamori, S. Mikami
Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, 2013, [Corresponding author], [International Magazine]
English, International conference proceedings, A vibration based Structural Health Monitoring (SHM) is expected to be a key technique to improve structural safety. In general application of SHM, an algorithm takes the year to year change in vibration characteristics and then diagnoses the condition of a structure. Its sensors must be located at a high density in order to determine little changes of the structural dynamic response. A conventional wired sensor system is not efficient in the SHM because such traditional sensor system takes installation time and costs. A smart sensor which is an electronic device using MEMS (Micro Electro Mechanical Systems) has a potential to enable efficient vibration measurement because of its wireless communication function and on-board processing ability. The authors have developed a smart sensor system that meets requirements under low temperature environments where civil structures are exposed. The Imote2 smart sensor system is applied in such studies. In this study, the authors performed a vibration measurement experiment on a curved PC box girder viaduct in winter season. 10 smart sensors are placed on the coping in the main span. The fundamental natural frequency of the viaduct and its mode shape are obtained from traffic-induced vibration. These vibration characteristics are equivalent to the measurement results that were taken when completed 12 years ago. As a result, it is considered that the viaduct has maintained structural integrity from the point of dynamic characteristics and smart sensor system can be applied to bridge vibration measurement as an efficient monitoring device., 40291362

A BASIC STUDY OF TSUNAMI EVACUATION TO SHELTER BUILDINGS AND CIVIL STRUCTURES IN KUSHIRO CITY
MIYAMORI Yasunori, UCHIUMI Kota, SHIMIZU Toshiaki, YAMASAKI Shintaro, OTSUKA Hisanori
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 69, 4, I_919, I_931, Japan Society of Civil Engineers, 2013, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal, We discuss evacuation planning from tsunami disasters in Kushiro City. The city has not experienced severe tsunami disasters since the recorded history of the 19th century. However, "Ainu", an aborigine of Hokkaido, has been brought down past severe tsunami disasters by word of mouth. In addition, geological evidences indicate them as well. The Hokkaido Prefectural Government announced new data and maps obtained by the tsunami simulation that is reconstructed on account of the geological evidences of the past huge tsunami disasters. We performed on-site investigation by using geographical survey, and used GIS analysis. Then, we concluded that survivability will increase without new evacuation buildings for tsunami disasters if we use tall buildings and elevated highways which have been used, as temporal evacuation sites.

Detection and localization of small damages in a real bridge by local excitation using piezoelectric actuators
P. Rathish Kumar, Toshiyuki Oshima, Tomoyuki Yamazaki, Shuichi Mikami, Yasunouri Miyamouri
Journal of Civil Structural Health Monitoring, 2, 2, 97, 108, Sep. 2012, [Peer-reviewed], [International Magazine]
English, Scientific journal, Detection, localization and estimation of small damage using piezoelectric actuators for local excitation is the main idea of this study. The theoretical background of an algorithm based on power spectral density (PSD) method suiting multiple damage detection is developed and verified experimentally with the field data obtained from a composite steel bridge. The method is based on only the output data from the accelerometers without the need for measuring the excitation force. Some damage scenarios were introduced to the test structure by releasing bolts from the members connecting the lower lateral members and the main longitudinal girder. The results indicate that the PSD method could identify the location and monitor small damage growth in structural members. © 2012 Springer-Verlag.

Damage identification in a lightly reinforced concrete beam based on changes in the power spectral density
Rathish P. Kumar, T. Oshima, S. Mikami, Y. Miyamori, T. Yamazaki
Structure and Infrastructure Engineering, 8, 8, 715, 727, Aug. 2012, [Peer-reviewed], [International Magazine]
English, Scientific journal, This paper deals with the detection of damage in a lightly reinforced concrete beam using dynamic measurements. An algorithm based on changes in the power spectral density (PSD) is presented. The algorithm is used to detect damage, predict the location and assess the extent of damage in the reinforced concrete beam. The method is based on the measured data on the beam after introducing some damage at salient locations. A tuneable piezoelectric actuator was used to produce additional peaks in the dynamic response of the system in the frequency domain. These additional peaks were adjusted over the frequency band by tuning the actuator. It was noticed from the results, that the PSD method detected the damage, determine the location and could monitor the increase in damage in the beam. © 2012 Taylor and Francis Group, LLC.

DEVELOPMENT OF PSEUDO-DYNAMIC SIMULATION SYSTEM WITH A GENERAL FEM SOFTWARE AT LOW-TEMPERATURE ENVIRONMENT
宮森保紀, 湯村美紀, 藤生重雄, 樋口匡輝, 山崎智之, 三上修一, 大島俊之
Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 68, 4, I_608, I_616, Japan Society of Civil Engineers, 2012, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal, In this study, A substractured pseudo-dynamic simulation system for low-temperature environment is developed. The developed system utilizes an open-source pseudo-dynamic system UI-SIMCOR and a sub-program which can cooperate with existent loading facility in a cold room is developed. To enhance usability of the system, another sub-program is also developed for application of general FEM software.
 A simulation for a simple girder model with seismic damper is performed. Dynamic response of the damper is obtained as a part of whole structure and friction type displacement-force hysteresis curve is properly obtained. The maximum displacement is reduced 80% by energy dissipation of the damper. The result of the simulation is not affected by low temperature because the damper is stable to lowtemperature as shown in previous studies.
 Hence, the system is able to work properly as a substructred pseudo-dynamic simulation facility at a low-temperature environment. For farther development, velocity control of loading equipment will improve accuracy of simulation results., 40285963

A vibration measurement of a pedestrian suspension bridge and development of anti-low temperature measurement system for smart sensor
Miyamori Yasunori, Ban Kazuhei, Oshima Toshiyuki, Mikami Shuichi, Yamazaki Tomoyuki
Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 58, 216, 225, Japan Society of Civil Engineers, 2012, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal, Smart sensor systems are expected to be a suitable sensing solution for structural health monitoring of infrastructures because such sensors can transfer data via wireless network. In this study, an Imote2 smart sensor system is applied for bridge vibration measurement test. Weather proof housing with solar energy harvesting system is also developed for outdoor measurement. A cold room test of the housing has been done before real bridge measurement. The test bridge is an old pedestrian suspension bridge. Measurement results revealed that the developed solar energy system supplies enough power to a smart sensor. Natural vibration modes of the bridge are detected from free vibration data properly., 40291362

Damage identification of civil infrastructures with array sensing under local excitation
Toshiyuki Oshima, Shuichi Mikami, Yasunori Miyamori, Tomoyujki Yamazaki, Sherif Beskhyroun
Structural Health Monitoring of Intelligent Infrastructure - Proceedings of the 4th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII 2009, 2009, [Peer-reviewed], [Domestic magazines]
English, International conference proceedings, A method of damage identification for engineering structures based on strain energy is dealt with in this paper. The method is described theoretically and applied to the experimental data on structural members. Several damage scenarios were introduced to the members of the structure. Experimental results show that the proposed approach may be successfully implemented to detect damage and to locate regions where damage occurred. This research also aims at establishment of experimental environment to enable the verification of applicability and the effective evaluation of the structural health monitoring (SHM) technology that uses the high performance sensor system on real bridges. The primary goal of the project is development of test beds that meet wider requests for SHM experiments. Several steel bridges on an abolished railway in Hokkaido, Japan will be available for the establishment of the test beds. The test beds can be utilized by not only researchers of this project but also other researchers. The final goal of the project is international contribution by means of cooperative utilization of the test beds.

Study on functional characteristics of shock absorbing rubber and its application to real bridges
Aochi Tomoya, Oshima Toshiyuki, Miyamori Yasunori, Masuda Kenji, Wakasugi Hiroshi
Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 55, 768, 777, Japan Society of Civil Engineers, 2009, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal, Functional characteristics of shock absorbing rubber is investigated by dynamic loading test and load- displacement relationship and its energy absorption characteristics are obtained in this study. By modeling its energy absorption characteristics, application to real bridge structures is analyzed by numerical calculations. And proposed shock absorbing rubber functioned well for strong earthquake impact and effectiveness to real bridges was shown in numerical results.

Nonlinear seismic response analysis of steel cable stayed bridge model based on vibration monitoring data
Kimura Hiroshi, Miyamori Yasunori, Mikami Shuichi, Yamazaki Tomoyuki, Oshima Toshiyuki
Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A), 55, 317, 328, Japan Society of Civil Engineers, 2009, [Peer-reviewed], [Corresponding author], [Domestic magazines]
English, Scientific journal, Structural monitoring is expected to improve accuracy of seismic performance evaluation of existing structures. Vibration monitoring data is suitable for composing dynamic numerical model and ambient vibration data are available instead of limited number of seismic data. In this study, a steel cable stayed bridge is modeled based on ambient vibration data and its bearing are represented in bilinear model. Validity of the model is confirmed by dynamic response analysis for recorded minor seismic waves. Then large seismic ground motions are input to the model and different action of bearing is confirmed. Hence the entire responses of the bridge are reasonable for each seismic input by using the proposed model.

Steel bridges in the Furusato Ginga Line (formar Chihoku Line)
Yasunori Miyamori, Tatsuo Shirakawa, Tomoyuki Yamazaki, Hiroyoshi Onishi, Shuichi Mikami, Toshiyuki Oshima
Journal of historical studies in civil engineering, 28, 13, 21, 土木学会, 2009, [Lead author, Corresponding author], [Domestic magazines]
Japanese, Scientific journal

Long-term remote monitoring of a cable stayed bridge and seasonal fluctuation of modal parameters
Y. Miyamori, H. Kimura, T. Oshima, T. Ayame
Proceedings of the World Forum on Smart Materials and Smart Structures Technology, SMSST'07, 86, 87, 2008, [Lead author, Corresponding author], [Domestic magazines]
English, International conference proceedings

Investigation on initial structural condition and analytical modeling of U-shaped steel girder bridge
Mikami Shuichi, Miyamori Yasunori, Oshima Toshiyuki, Ishikawa Hiroyuki, Kadota Takanori
Journal of Structural Engineering, A, 54A, 538, 547, Japan Society of Civil Engineers, 2008, [Peer-reviewed], [Domestic magazines]
English, Scientific journal, Initial condition measurement of static deformation behavior before its service start and vibration characteristics on completed bridge of U-shaped steel girder bridge, are dealt with in this paper. The 3-dimensional Finite Element Method is used to model this tested bridge. The deformation characteristics of shoes was measured and detailed modeling of this effects needs to consider. And the natural frequency characteristics of their modes are examined using the ERA (Eigensystem Realization Algorithm) method. Simulation analysis considering road surface irregularity and coupling effects between vehicle and bridge was done. The data of this analysis is utilized to monitor the change of deformation and vibration characteristics due to the degradation and damage of bridge.

Issues in structural health monitoring employing smart sensors
T. Nagayama, S. H. Sim, Y. Miyamori, B. F. Spencer
Smart Structures and Systems, 3, 3, 299, 329, Jul. 2007, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal, Smart sensors densely distributed over structures can provide rich information for structural monitoring using their onboard wireless communication and computational capabilities. However, issues such as time synchronization error, data loss, and dealing with large amounts of harvested data have limited the implementation of full-fledged systems. Limited network resources (e.g. battery power, storage space, bandwidth, etc.) make these issues quite challenging. This paper first investigates the effects of time synchronization error and data loss, aiming to clarify requirements on synchronization accuracy and communication reliability in SHM applications. Coordinated computing is then examined as a way to manage large amounts of data.

Comparison between seismic response analysis and monitoring data on steel cable-stayed bridge
MIYAMORI Yasunori, IKEDA Noritoshi, KIMURA Hiroshi, MIKAMI Shuichi, OSHIMA Toshiyuki
Proceedings of the JSCE Earthquake Engineering Symposium, 29, 468, 474, Japan Society of Civil Engineers, 2007, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
English, Scientific journal, A 3D model for dynamic response analysis is composed based on ambient vibration monitoring data. Natural excitation technique and Eigenrealization algorithm (ERA) are applied to obtain modal parameters. A analytical modal parameters of the model are consistent with the real modal parameters calculated by ERA. Dynamic response analysis are performed for several small earthquake waves and their analytical results are agreed with response of actual monitored data. Dynamic response analysis are also performed for severe earthquake waves.

APPLICATION OF A VIBRATION-BASED DAMAGE DETECTION ALGORITHM ON A BENCHMARK STRUCTURE
Shuichi Mikami, Sherif Beskhyroun, Yasunori Miyamori, Toshiyuki Oshima
PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON STRUCTURE HEALTH MONITORING & INTELLIGENT INFRASTRUCTURE: STRUCTURAL HEALTH MONITORING & INTELLIGENT INFRASTRUCTURE, ISHMII-INT SOC STRUCTURAL HEALTH MONITORING INTELLIGENT INFRASTRUCTURE, 2007, [Peer-reviewed]
English, International conference proceedings, In recent years there has been great interest in the development of a structural health monitoring (SHM) methodology using vibration measurements. SHM using vibration monitoring is based on the idea of establishing differences in the modal properties of a structure using dynamic response data before and after damage. This paper presents a vibration-based damage identification technique that detects damage, identifies its location and monitors the growth in damage. The paper addresses the benchmark problem on SHM that was recently developed by the ASCE Task Group on SHM. The benchmark study was created to facilitate the comparison of several methods employed for the health monitoring of structures. The structure selected for the benchmark problem is a four-storey, 2-bay by 2-bay, steel braced frame. The damage was introduced by removing brace elements or disconnecting the beam-column bolted connections. The present paper focuses on different cases of this benchmark problem assuming unknown input. The proposed method is shown to be very effective for damage identification, and is relatively insensitive to noise in the sensors. Different issues regarding the performance, limitations, and difficulties of this methodology are discussed.

Identification of a human walking force model based on dynamic monitoring data from pedestrian bridges
Takashi Obata, Yasunori Miyamori
Computers and Structures, 84, 8-9, 541, 548, Mar. 2006, [Peer-reviewed], [International Magazine]
English, Scientific journal, A general investigation procedure for the vibration serviceability of pedestrian bridges is accomplished by comparing the dynamic response of structures to vibration effects on serviceability limiting states. The purposes of this study were to investigate the dynamic response characteristics of pedestrian bridges and to develop a human walking force model to assist in the development and design of pedestrian bridges. Human walking force parameters were identified by a genetic algorithm (GA) from experimental forced vibration data. The results of the dynamic response obtained by the GA were in agreement with the experimental results. Therefore, the GA system was useful in the identification of pedestrian walking forces, and from the experimental and calculated results, it is considered that the walking force model identified by the GA is substantially accurate. © 2005 Elsevier Ltd. All rights reserved.

A study on evaluation of ground displacement and effect of piles, joints and ground property in seismic design for axial direction of immersed tunnels by seismic displacement method
橘義規, 大塚久哲, 宮森保紀, 矢野恵美子
構造工学論文集 A, 51A, 1, 2005, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal

Experimental and analytical studies on structural instabilities during an earthquake
大塚久哲, 為広尚起, 宮森保紀, 藤井義法, 清水晋作
構造工学論文集 A, 51A, 1, 2005, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal

橋梁点検データと意識調査に基づいた劣化順位決定手法に関する一考察
小幡卓司, 井田俊輔, 宮森保紀, 林川俊郎, 佐藤浩一
構造工学論文集 A, 50A, 2, 2004, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal

不規則外力を受ける塔状構造物の可変剛性・減衰型振動制御に関する研究
宮森保紀, 小幡卓司, 安達一憲, 林川俊郎, 佐藤浩一, 大塚久哲
構造工学論文集 A, 50A, 1, 2004, [Peer-reviewed], [Lead author], [Domestic magazines]
Japanese, Scientific journal

鋼橋の損傷同定における音響モニタリングの適用に関する基礎的研究
小幡 卓司, 植田 康平, 宮森 保紀
応用力学論文集, 5, 827, 836, 土木学会, 2002, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal

Identification of Human Walking Force Model Based on Dynamic Characteristics of Pedestrian Bridges
Yasunori Miyamori, Takashi Obata, Tosiro Hayashikawa, Koichi Sato
Journal of Structural Engineering, 47A, 2, 343, 350, 2001, [Peer-reviewed], [Lead author], [Domestic magazines]
Japanese, Scientific journal

A consideration of applicability to semi-active variable damping control on bridge structures
Yasunori Miyamori, Takashi Obata, Toshiro Hayashikawa, Koichi Sato
Journal of Structural Engineering, 47A, 2, 371, 380, 2001, [Peer-reviewed], [Lead author], [Domestic magazines]
Japanese, Scientific journal

Consideration of applicability of active stiffness control system on cable structures
Takashi Obata, Yasunori Miyamori, Keisuke Inoue, Toshiro Hayashikawa, Koichi Sato
Journal of Structural Engineering, 45A, 737, 744, Mar. 1999, [Peer-reviewed], [Domestic magazines]
Japanese, Scientific journal

横断歩道橋のデッキプレート床版に生じる腐食損傷と振動特性の関係に関する数値解析　　　　　　　　　　　　　　　
長谷川皓生、門田峰典、齊藤剛彦、宮森保紀, 土木学会北海道支部論文報告集, 第79号, 31 Jan. 2023, [Domestic magazines]
Japanese, Summary national conference

桁遊間異常の原因推定のためのFEMモデルの構築と解析　　　　　　　　　　　　　　　
上野宏太、宮森保紀、岩渕直、門田峰典、竹原智久、齊藤剛彦、日向洋一、大島俊之, 土木学会北海道支部論文報告集, 第79号, 30 Jan. 2023, [Corresponding author], [Domestic magazines]
Japanese, Summary national conference

交差する部材を有する桁供試体の点群データからFEMデータへの変換に関する検討　　　　　　　　　　　　　　　
吉田明燁、宮森保紀、齊藤剛彦、門田峰典, 土木学会北海道支部論文報告集, 第79号, 29 Jan. 2023, [Corresponding author], [Domestic magazines]
Japanese, Summary national conference

鋼部材の点群データからFEMデータへの変換における部材隅角部の要素生成に関する検討　　　　　　　　　　　　　　　
吉田明燁、宮森保紀、齊藤剛彦, 土木情報学シンポジウム講演集, 第47回, 29 Sep. 2022, [Corresponding author], [Domestic magazines]
Japanese, Summary national conference

桁条件の異なるPC橋の振動特性の比較　　　　　　　　　　　　　　　
濱野谷拓望、松尾優子、小幡卓司、宮森保紀, 令和4年度土木学会全国大会第77回年次学術講演会講演概要集, 第77巻, 16 Sep. 2022, [Domestic magazines]
Japanese, Summary national conference

桁遊間計測システムによる単純非合成H 鋼桁橋の挙動モニタリング　　　　　　　　　　　　　　　
岩渕直、宮森保紀、竹原智久、齊藤剛彦、日向洋一、大島俊之, 令和4年度土木学会全国大会第77回年次学術講演会講演概要集, 第77巻, 15 Sep. 2022, [Domestic magazines]
Japanese, Summary national conference

橋梁モニタリングのためのLPWA通信実験　　　　　　　　　　　　　　　
宮森保紀、佐々木竜太、山崎智之、日向洋一, 令和4年度土木学会全国大会第77回年次学術講演会講演概要集, 第77巻, 14 Sep. 2022, [Corresponding author], [Domestic magazines]
Japanese, Summary national conference

鋼構造物の点群モデルからFEMモデルを構築するための要素生成方法の改良に関する検討　　　　　　　　　　　　　　　
吉田明燁、宮森保紀、齊藤剛彦, 令和4年度土木学会全国大会第77回年次学術講演会講演概要集, 第77巻, 13 Sep. 2022, [Corresponding author], [Domestic magazines]
Japanese, Summary national conference

雪寒地域の橋梁傾斜角モニタリングシステムの実証実験　　　　　　　　　　　　　　　
日向洋一、宮森保紀、今泉宜人、竹原智久、三上修一、大島俊之, 令和4年度土木学会全国大会第77回年次学術講演会講演概要集, 第77巻, 12 Sep. 2022, [Domestic magazines]
Japanese, Summary national conference

The Communication Range of LPWA Communication for Bridge Structural Monitoring
佐々木竜太, 宮森保紀, 山崎智之, 日向洋一, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Field vibration test on different soundness of PC hollow slab bridges
松尾優子, 三上颯太, 宮森保紀, 小幡卓司, 澤田純之, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

The Photographing Method for Constructing 3D Point Cloud Models of Three-Dimensional Structures
吉田明よう, 宮森保紀, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

The detailed classification method of prestressed hollow core slab bridges for bridge maintenance
奥村涼平, 宮森保紀, 三上修一, 齊藤剛彦, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 78, 2022

Performance of the loading facility and time required for pseudo dynamic test
高岡陽, 齊藤剛彦, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Bearing displacement variation in long term monitoring of a steel bridge
齊藤茉奈美, 宮森保紀, 吉中正滋, 柴田祐貴, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

A fundamental study for safety threshold of scoured bridge pier by using FE model
中野孝亮, 宮森保紀, 今泉宜人, 日向洋一, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Fundamental study on estimation of member temperature by heat transfer analysis and change of natural frequency of a bridge
吉中正滋, 宮森保紀, 柴田祐貴, 齊藤茉奈美, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Investigation of repair work on dynamic characteristics of a minor girder bridge
柴田祐貴, 宮森保紀, 吉中正滋, 齊藤茉奈美, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Field vibration test on a PC hollow slab bridge with longitudinal slope of 6%
松尾優子, 三上颯太, 森下傑彦, 宮森保紀, 小幡卓司, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Seismic response analysis of bridges used high damping rubber bearings by pseudo dynamic simulation at low temperature environment
齊藤剛彦, 宮森保紀, 中村保之, 山崎信宏, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Analytical investigation of bearing capacity around bridge end by considering the damage pattern of corrosion of end cross beam
岩渕直, 宮森保紀, 大島俊之, 三上修一, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

3D point cloud model construction experiment of concrete reinforced soil wall using images taken by drone
工藤将暉, 宮森保紀, 佐藤瑛典, 林篤史, 小林大, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Automated FE modeling of an I shape steel girder specimen from the 3D dense point cloud model
佐藤瑛典, 宮森保紀, 工藤将暉, 山崎智之, 齋藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Detailed classification of superstructure type and deck type for bridges in the Okhotsk region
宮森保紀, 三上修一, 八尾早知繪, 齊藤剛彦, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 77, 2021

Challenges for Smart and Resilient Structural System on Cold and Low Density Lands
宮森保紀, 橋梁と基礎, 55, 11, 2021

洪水時の橋台背面盛土の侵食・流出に関する大規模開水路実験
小山真輝, 御厩敷公平, 川尻峻三, 松田朋也, 渡邊康玄, 宮森保紀, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 2020

異なる対策工を用いた橋台背面盛土の流水作用時の盛土天端沈下量の比較・検討
御厩敷公平, 川尻峻三, 松田朋也, 渡邊康玄, 宮森保紀, 地盤工学会北海道支部技術報告集(CD-ROM), 60, 2020

長期モニタリングによる鋼鈑桁橋の部材温度が動的特性に与える影響
吉中正滋, 宮森保紀, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

主桁の損傷寸法が隣接主桁間の荷重伝達に与える影響に関する解析的検討
岩渕直, 宮森保紀, 大島俊之, 三上修一, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

撮影画像を用いた鋼構造物の3次元点群モデル構築手法に関する一検討
MUNKHJARGAL Dambiibaljir, 宮森保紀, 齊藤剛彦, 山崎智之, 鈴木紗苗, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

鋼構造部材の点群モデルから変換したFEMモデルの精度に関する一検討
鈴木紗苗, 宮森保紀, 齊藤剛彦, 山崎智之, 三上修一, MUNKHJARGAL Dambiibaljir, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

免震ゴム支承を有する橋梁を対象とした低温環境下におけるハイブリッド実験システムの構築
齊藤剛彦, 宮森保紀, 中村保之, 山崎信宏, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

屋外開水路実験における橋台洗掘の再現と数値解析
鈴木光, 宮森保紀, 川尻峻三, 渡邊康玄, 齊藤剛彦, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 76, 2020

DAMAGE OF ROAD BRIDGES BY 2018 HOKKAIDO IBURI TOBU EARTHQUAKE
Yasunori Miyamori, Takashi Sato, Takehiko Saito, Hiroaki Nishi, Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)), 76, 4, I_755, I_764, 2020, [Peer-reviewed], [Lead author, Corresponding author], [Domestic magazines]
Japanese, Report scientific journal, 40285957

端横桁腹板の腐食損傷の形状が支点部の耐荷性能に与える影響に関する解析的検討
岩渕直, 宮森保紀, 大島俊之, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 75th, 2020

Dynamic characteristics of a steel girder bridge model considering changes in temperature of bridge members
吉中正滋, 柴田祐貴, 宮森保紀, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会年次学術講演会講演概要集(CD-ROM), 75th, 2020

Development of a sub-structured hybrid simulation of bridge used high damping rubber bearings
高岡陽, 齊藤剛彦, 宮森保紀, 中村保之, 竹ノ内浩祐, 山崎信宏, 土木学会年次学術講演会講演概要集(CD-ROM), 75th, 2020

Investigation of aging and repair work on dynamic characteristics of a minor girder bridge by long term monitoring
柴田祐貴, 吉中正滋, 宮森保紀, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会年次学術講演会講演概要集(CD-ROM), 75th, 2020

Displacement mechanism of abutment under flood by medium scale open channel test
御厩敷公平, 小山真輝, 川尻峻三, 松田朋也, 渡邊康玄, 宮森保紀, 地盤工学研究発表会発表講演集(Web), 55th, 2020

Comparison of Machine Learning Techniques for Classification of Information Types on Twitter
PTASZYNSKI Michal, MASUI Fumito, NAKAJIMA Yoko, HAYAKAWA Hiroshi, SAITO Takehiko, MIYAMORI Yasunori, 言語処理学会年次大会発表論文集(Web), 25th, 2019

北海道胆振東部地震の震央近傍における地震動記録
佐藤京, 宮森保紀, 齊藤剛彦, 西弘明, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

横断歩道橋のFEMモデルを用いた損傷同定手法の検討
白川雄太, 門田峰典, 宮森保紀, 小幡卓司, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

点群データから構造解析モデルへの変換の自動化に関する検討
鈴木紗苗, 宮森保紀, 齊藤剛彦, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

平成30年北海道胆振東部地震における道路橋被害
宮森保紀, 齊藤剛彦, 佐藤京, 西弘明, 土木学会北海道支部論文報告集(CD-ROM), 75, 2019

端横桁等の損傷が支点部の耐荷性能に与える影響に関する解析的検討
岩渕直, 宮森保紀, 大島俊之, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 74th, 2019

高減衰ゴム支承のひずみ量と面圧の違いによる温度依存性の実験的検討
齊藤剛彦, 中村保之, 山崎信宏, 宮森保紀, 増田悠希, 土木学会年次学術講演会講演概要集(CD-ROM), 74th, 2019

長期モニタリングによる鋼鈑桁橋の動的応答特性に交通車両が与える影響
吉中正滋, 小川大智, 宮森保紀, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会年次学術講演会講演概要集(CD-ROM), 74th, 2019

平成30年北海道胆振東部地震とその災害に関する総合調査
高橋浩晃, 勝俣啓, 大園真子, 橋本武志, 青山裕, 酒井慎一, 松本聡, 岡田知己, 小菅正裕, 寺川寿子, 飯尾能久, 中尾茂, 上嶋誠, 柴田智郎, 大津直, 高井伸雄, 飯場正紀, 渡部要一, 菊地優, 岡崎太一郎, 白井和貴, 西村裕一, 石川達也, 高瀬裕也, 永井宏, 宮森保紀, 三宅弘恵, 松島信一, 浅野公之, 重藤迪子, 卜部厚志, 前田宜浩, 石澤友浩, 廣瀬亘, 小山内信智, 山田孝, 笠井美青, 檜垣大助, 風間基樹, 千木良雅弘, 渦岡良介, 竹林洋史, 木村誇, 石丸聡, 岡田成幸, 内田賢悦, 有村幹治, 植松武是, 多々納裕一, 梶谷義雄, 能島暢呂, 田村圭子, 中村洋光, 戸松誠, 自然災害科学総合シンポジウム要旨集, 56th, 2019

3次元点群モデルのFEMデータへの変換手法に関する一検討
鈴木紗苗, 宮森保紀, 齊藤剛彦, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 74th, 2019

Experiment study for washout of bask-fill of abutment by medium scale open channel test.
御厩敷公平, 川尻峻三, 高村寿希, 松田朋也, 鎌田啓市, 渡邊康玄, 宮森保紀, 地盤工学研究発表会発表講演集(Web), 54th, 2019

鋼構造部材の3次元点群モデル構築とFEMデータへの自動変換に関する検討
鈴木紗苗, 宮森保紀, 齊藤剛彦, 山崎智之, ムンフジャルガル ダンビーバルジル, 土木情報学シンポジウム講演集, 44, 2019

土質が異なる橋台背面盛土を対象とした屋外開水路による侵食実験
御厩敷公平, 川尻峻三, 小山真輝, 松田朋也, 渡邊康玄, 宮森保紀, 日本自然災害学会学術講演会講演概要集, 38th, 2019

低温環境下で載荷されるゴム支承の内部温度と力学的特性の検討
齊藤剛彦, 入江駿亮, 中村保之, 宮森保紀, 山崎智之, 竹ノ内浩祐, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

横断歩道橋の動的応答量の実測値とFEMモデルによる動的解析の比較
白川雄太, 門田峰典, 宮森保紀, 小幡卓司, 中野慎人, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

低温環境下における新しい高減衰ゴム支承の力学特性に関する実験的研究
中村保之, 入江駿亮, 齊藤剛彦, 宮森保紀, 山崎智之, 竹ノ内浩祐, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

長期橋梁モニタリングによる少数主桁橋の固有振動数の変動
小川大智, 高橋友弥, 宮森保紀, 大胡拓矢, 富岡昭浩, 宮下剛, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

桁端近傍センサ配置による局部加振法を用いた橋梁部材損傷検出方法の検討
橋爪志奈, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

構造系科目における「アクティブラーンニング」実施に関する試み
小幡卓司, 松尾優子, 小室雅人, 宮森保紀, 佐藤太裕, 平沢秀之, 齊藤剛彦, 三上修一, 渡辺力, 栗橋祐介, 松本高志, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

異なる形式の供試体を用いたゴム支承の温度依存性に関する実験的研究
齊藤剛彦, 中村保之, 入江駿亮, 宮森保紀, 山崎智之, 竹ノ内浩祐, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

河川増水時における橋台の洗堀が構造安定性に及ぼす基礎的検討
鎌田啓市, 高橋大樹, 宮森保紀, 渡邊康玄, 川口貴之, 川尻峻三, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

橋台裏の浸食に関する水理実験
金子大輝, 渡邊康玄, 川尻峻三, 川口貴之, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 74, 2018

開水路実験による河川増水時の橋台背面盛土の侵食機構と対策工について
川尻峻三, 川口貴之, 御厩敷公平, 鎌田啓一, 川俣さくら, 川俣さくら, 倉知禎直, 原田道幸, 渡邊康玄, 宮森保紀, 地盤工学研究発表会発表講演集(CD-ROM), 53rd, 2018

河川増水時における橋台の支持地盤の洗掘が橋台の構造安定性に及ぼす基礎的検討
鎌田啓市, 川尻峻三, 川口貴之, 高橋大樹, 宮森保紀, 渡邊康玄, 三上修一, 地盤工学研究発表会発表講演集(CD-ROM), 53rd, 2018

形鋼桁の桁端部腐食損傷に対する耐荷性能に関する基礎的実験と解析
岩渕直, 宮森保紀, 大島俊之, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

桁端近傍センサ配置による局部加振法を用いた橋梁損傷位置検出手法の検討
橋爪志奈, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

実測結果に基づくFEMモデルを用いた横断歩道橋の動的応答解析
白川雄太, 門田峰典, 宮森保紀, 小幡卓司, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

模型盛土を用いた開水路実験による橋台背面盛土の侵食・流失対策
御厩敷公平, 川尻峻三, 川口貴之, 川俣さくら, 川俣さくら, 倉知禎直, 渡邊康玄, 宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

構造系科目におけるAL実施に関する試行について
小幡卓司, 松尾優子, 小室雅人, 宮森保紀, 佐藤太裕, 平沢秀之, 齊藤剛彦, 三上修一, 渡辺力, 栗橋祐介, 松本高志, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

橋台支持地盤の洗掘方向が橋台の損傷に及ぼす影響の検討
鎌田啓市, 高橋大樹, 宮森保紀, 渡邊康玄, 川口貴之, 川尻峻三, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

高密度点群データの構造解析モデルへの変換に関する基礎的検討
鈴木紗苗, 宮森保紀, 齊藤剛彦, 泉保則, 洞口克彦, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

網走橋の歴史的変遷と技術的考察
進藤義郎, 宮森保紀, 原口征人, 今尚之, 土木学会年次学術講演会講演概要集(CD-ROM), 73rd, 2018

高密度点群データの構造解析モデルへの変換に関する基礎的研究
鈴木紗苗, 宮森保紀, 齊藤剛彦, 土木情報学シンポジウム講演集, 43, 2018

水理模型実験による橋台背面盛土の崩壊メカニズムと対策工に関する検討
御厩敷公平, 川俣さくら, 川尻峻三, 川口貴之, 倉知禎直, 渡邊康玄, 宮森保紀, 地盤工学会北海道支部技術報告集, 58, 97, 104, 2018

2016年8月北海道豪雨による無加川の洪水災害
早川博, 渡邊康玄, 川尻峻三, 川口貴之, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

2016年8月常呂川洪水における構造物等被災概況報告
渡邊康玄, 早川博, 川口貴之, 川尻峻三, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

2016年北海道豪雨災害における橋梁被害の被災メカニズムの基礎的検討
鎌田啓市, 宮森保紀, 渡邊康玄, 川口貴之, 川尻峻三, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

老朽化した横断歩道橋の固有振動特性と動的応答の経年比較
宮森保紀, 白川雄太, ZHANG Youqi, 門田峰典, 齊藤剛彦, 小幡卓司, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

部材温度と振動振幅が単純PC梁の固有振動特性へ与える影響
宮森保紀, 小川大智, 齊藤剛彦, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

道内大学の鋼構造科目の学習内容と実務者ニーズの比較
松尾優子, 小室雅人, 宮森保紀, 佐藤太裕, 平沢秀之, 齊藤剛彦, 三上修一, 渡辺力, 栗橋祐介, 松本高志, 小幡卓司, 土木学会北海道支部論文報告集(CD-ROM), 73, 2017

部材温度の変動が単純PC梁の固有振動特性へ与える影響
宮森保紀, 小川大智, 齊藤剛彦, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

横断歩道橋の固有振動特性と動的応答量の経年比較
白川雄太, 宮森保紀, 小幡卓司, 門田峰典, 張友奇, 齊藤剛彦, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

局部加振法を用いた橋梁主桁損傷検出のセンサー配置による検出精度の検討
橋爪志奈, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

低温環境下におけるゴム支承の温度依存性に関する実験的研究
入江駿亮, 中村保之, 齊藤剛彦, 宮森保紀, 山崎智之, 竹ノ内浩祐, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

2016年北海道豪雨による橋梁の被災状況と発生メカニズムの基礎的検討
鎌田啓市, 宮森保紀, 渡邊康玄, 川口貴之, 川尻峻三, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

低温環境下における新しい高減衰ゴム支承の力学特性に関する実験的研究
中村保之, 入江駿亮, 齊藤剛彦, 宮森保紀, 山崎智之, 竹ノ内浩祐, 土木学会年次学術講演会講演概要集(CD-ROM), 72nd, 2017

構造系教育におけるアクティブラーニングと評価法に関する検討
齊藤剛彦, 宮森保紀, 三上修一, 松尾優子, 小室雅人, 栗橋祐介, 渡辺力, 平沢秀之, 佐藤太裕, 松本高志, 小幡卓司, 土木学会北海道支部論文報告集(CD-ROM), 72, 2016

局部加振法を用いた質量付加による損傷検出評価方法の検討
柳原裕平, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 日向洋一, 土木学会北海道支部論文報告集(CD-ROM), 72, 2016

複数の制震ダンパーを有する構造物の遠隔・低温域サブストラクチャハイブリッド実験
宮森保紀, 齋藤樹里, 多賀優冶, 入澤祐太, 河内山修, 土木学会北海道支部論文報告集(CD-ROM), 72, 2016

局部加振法のためのセンサ配置を考慮した損傷検出評価方法の検討
柳原裕平, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 日向洋一, 土木学会年次学術講演会講演概要集(CD-ROM), 71st, 2016

5径間単純PC鉄道橋の固有振動数の季節変動と供試体実験
宮森保紀, 張友奇, 中島斎, 門田峰典, 土木学会年次学術講演会講演概要集(CD-ROM), 71st, 2016

地域と連携して学生を教育する試み~オホーツク総合演習~
川口貴之, 舘山一孝, 高橋清, 宮森保紀, 渡邊康玄, 産学連携学会大会講演予稿集, 13th, 2015

土木系学科の構造力学教育と実務者ニーズについて
平沢秀之, 松尾優子, 小室雅人, 齋藤剛彦, 宮森保紀, 三上修一, 佐藤太裕, 渡辺力, 松本高志, 何興文, 栗橋祐介, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, 2015

土木系学科の鋼構造教育と実務者ニーズについて
平沢秀之, 栗橋祐介, 小室雅人, 松尾優子, 宮森保紀, 三上修一, 佐藤太裕, 渡辺力, 松本高志, HE Xingwen, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

構造健全度診断のための実損傷橋梁の数値解析モデル構築
宮森保紀, 門田峰典, 綿崎良祐, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

実横断歩道橋の3次元固有振動特性同定と損傷位置検出の検討
綿崎良祐, 門田峰典, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

釧路市における既存構造物の地震動被害を考慮した津波避難に関する検討
齊藤剛彦, 村本穂乃佳, 清水俊明, 宮森保紀, 山内朋哉, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

多質点系モデル解析を用いた局部加振法による欠陥検出評価方法の検討
柳原裕平, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

釧路市低平地における津波避難開始時間が避難可能範囲に及ぼす影響の検討
清水俊明, 宮森保紀, 齊藤剛彦, 山内朋哉, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

横断歩道橋を対象とした3次元振動特性同定と損傷位置同定
綿崎良祐, 宮森保紀, 門田峰典, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, 2015

横断歩道橋の数値解析モデル構築と補修前後のモード振幅の相関性による損傷同定の検討
門田峰典, 宮森保紀, 綿崎良祐, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, 2015

局部加振法のための多質点系モデルを用いた損傷検出評価方法の検討
柳原裕平, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 日向洋一, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, 2015

複数の構造実験部分を有する遠隔・低温域サブストラクチャハイブリッド地震応答解析
齋藤樹里, 多賀優冶, 齊藤剛彦, 入澤祐太, 宮森保紀, 三上修一, 山崎智之, 河内山修, 土木学会年次学術講演会講演概要集(CD-ROM), 70th, 2015

釧路地域沿岸部における大規模津波による桁抵抗力作用力比を用いた簡易評価
山内朋哉, 宮森保紀, 清水俊明, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 71, 2015

釧路市低平地における津波避難可能範囲に関する一検討
清水俊明, 内海晃太, 村本穂乃佳, 齊藤剛彦, 宮森保紀, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

スマートセンサーを用いた実橋梁の固有振動特性同定と気温の影響
綿崎良祐, 岡本覚人, PAN Kaikai, 宮森保紀, 齊藤剛彦, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

鋼構造教育における見学会と学習の関係性に関するアンケート分析
松本高志, 小室雅人, 宮森保紀, 平沢秀之, 佐藤太裕, HE Xingwen, 栗橋祐介, 松尾優子, 三上修一, 渡部力, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

釧路市低平地における既存構造物を利用した津波避難に関する一検討
内海晃太, 清水俊明, 村本穂乃佳, 齊藤剛彦, 宮森保紀, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

スマートセンサーの土木構造物への適用における一検討
PAN Kaikai, 綿崎良祐, 宮森保紀, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

モード形状の変化を用いた振動実験による鋼供試体の損傷位置同定
高祖伸幸, 宮森保紀, 山崎智之, 齊藤剛彦, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

スマートセンサーを用いた3次元加速度計測による横断歩道橋の振動特性同定
岡本覚人, 西山勝隆, 宮森保紀, 齊藤剛彦, 三上修一, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

データの大規模化に対応した構造振動データレポジトリシステムの開発
宮森保紀, 坪田豊, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

複数の制震ダンパー有する構造物の遠隔・低温域サブストラクチャハイブリッド地震応答解析のためのデスクトップ実験
齋藤樹里, 宮森保紀, 山崎智之, 三上修一, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

13年間供用した3径間連続PC高架橋の全体系振動計測
潘凱凱, 宮森保紀, 綿崎良祐, 三上修一, 門田峰典, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, 2014

複数の構造実験部分を有するサブストラクチャハイブリッド地震応答解析のためのデスクトップ実験
齋藤樹里, 山崎智之, 齊藤剛彦, 長島和央, 宮森保紀, 三上修一, 河内山修, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, 2014

製鉄所見学会と学習の関係性に関するアンケート分析
松本高志, 小室雅人, 宮森保紀, 平沢秀之, 佐藤太裕, 何興文, 栗橋祐介, 松尾優子, 三上修一, 渡部力, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, 2014

損傷を有する実横断歩道橋の3軸加速度計測による固有振動特性同定
綿崎良祐, 宮森保紀, 門田峰典, 三上修一, 岡本覚人, 齊藤剛彦, 潘凱凱, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, 2014

PVDF加速度計を用いた損傷検出システムの検討
鈴木喬之, 三上修一, 山崎智之, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

局部加振移動平均法による小規模鋼橋の微小欠陥検出の検討
高橋徹, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 70, 2014

釧路市低平地における避難条件の違いが及ぼす津波避難可能範囲の検討
清水俊明, 内海晃太, 宮森保紀, 齊藤剛彦, 土木学会年次学術講演会講演概要集(CD-ROM), 69th, 2014

鋼材降伏系ダンパーに用いられる低降伏点鋼材の低温時特性の評価
岡田慎哉, 表真也, 西弘明, 宮森保紀, 鋼構造年次論文報告集(CD-ROM), 22, 2014

スマートセンサーを用いたPC高架橋での振動特性同定
岡本覚人, 宮森保紀, 綿崎良祐, 三上修一, 潘凱凱, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

釧路市における津波避難に関する基礎的検討~大楽毛地区と釧路川右岸地区の比較~
清水俊明, 内海晃太, 宮森保紀, 齊藤剛彦, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

釧路川右岸地区における既存構造物を利用した津波避難に関する一検討
内海晃太, 清水俊明, 宮森保紀, 齊藤剛彦, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

シラバスによる国公立大学の構造系科目開講状況に関する実態調査
小室雅人, 佐藤太裕, 宮森保紀, 平沢秀之, 松本高志, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

局部加振法による微小構造欠陥の検出法に関する研究
高橋徹, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

橋梁振動測定のためのImote2スマートセンサーにおける電源システムの改良
綿崎良祐, 宮森保紀, 岡本覚人, 三上修一, 潘凱凱, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

釧路市における津波避難に用いる構造物情報のデータベース化
清水俊明, 宮森保紀, 内海晃太, 齊藤剛彦, 日本自然災害学会学術講演会講演概要集, 32nd, 2013

釧路市沿岸部における既存構造物を用いた津波避難に関する検討
内海晃太, 宮森保紀, 清水俊明, 齊藤剛彦, 日本自然災害学会学術講演会講演概要集, 32nd, 2013

釧路市における既存構造物の耐震性を考慮した津波避難に関する検討
齊藤剛彦, 宮森保紀, 内海晃太, 清水俊明, 日本自然災害学会学術講演会講演概要集, 32nd, 2013

シラバスによる構造系科目の開講状況に関する実態調査
小室雅人, 佐藤太裕, 宮森保紀, 平沢秀之, 松本高志, 渡辺力, 三上修一, 栗橋祐介, HE Xingwen, 松尾優子, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

スマートセンサーを用いた3次元加速度計測による人道用吊橋の振動特性同定
岡本覚人, 綿崎良祐, 宮森保紀, 加地善則, 三上修一, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

釧路市街地における既存構造物を利用した津波避難に関する一検討
内海晃太, 清水俊明, 山崎新太郎, 宮森保紀, 齊藤剛彦, 大塚久哲, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

PVDF加速度計を用いた損傷検出システムの検討
鈴木喬之, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

低温域サブストラクチャ・ハイブリッド地震応答解析のための段階的実験環境の構築
宮森保紀, 齋藤樹里, 山崎智之, 三上修一, 齊藤剛彦, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

PVDF加速度計を用いた損傷検出システムの検討
鈴木喬之, 三上修一, 山崎智之, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

モード振幅の変化を利用した鋼橋の損傷位置同定に関する基礎的検討
高祖伸幸, 宮森保紀, 山崎智之, 三上修一, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 68th, 2013

局部加振法による小規模鋼橋の微小欠陥検出の検討
高橋徹, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

モード形状の変化に基づく鋼橋の損傷位置同定に関する基礎的検討
高祖伸幸, 宮森保紀, 山崎智之, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

東北地方太平洋沖地震の強震記録を用いた南海地震の揺れの体験談の解釈法の検証
齊藤剛彦, 三神厚, 宮森保紀, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 69, 2013

スマートセンサーを用いた人道吊橋の振動特性同定
岡本覚人, 宮森保紀, 三上修一, 山崎智之, 坂和平, 土木学会年次学術講演会講演概要集(CD-ROM), 67th, 2012

大学・高専における構造・鋼構造関連科目に対する技術者ニーズ調査
宮森保紀, 平沢秀之, 佐藤太裕, 小室雅人, 渡辺力, 三上修一, 栗橋祐介, 松本高志, 何興文, 土木学会年次学術講演会講演概要集(CD-ROM), 67th, 2012

新旧橋梁点検実績データの統一化のための換算手法に関する検討
樅山哲也, 大島俊之, 三上修一, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 68, 2012

大学・高専における鋼構造関連の学習項目に対する技術者ニーズ調査
宮森保紀, 平沢秀之, 佐藤太裕, 小室雅人, 渡辺力, 三上修一, 栗橋祐介, 松本高志, HE Xingwen, 土木学会北海道支部論文報告集(CD-ROM), 68, 2012

スマートセンサーを用いた人道用吊橋の振動測定実験
宮森保紀, 坂和平, 岡本覚人, 山崎智之, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 68, 2012

汎用FEM解析ソフトを利用した低温環境用仮動的実験システムの構築
宮森保紀, 湯村美紀, 藤生重雄, 樋口匡輝, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 68, 2012

積層圧電アクチュエータによる局部加振法を用いた鉄道廃線橋梁の損傷検出の研究
坪川良太, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 68, 2012

新旧点検要領データを活用した橋梁部材劣化の検討
樅山哲也, 大島俊之, 山崎智之, 三上修一, 宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, 2011

低温環境下における制震ダンパーを有する単純桁橋梁のサブストラクチャ仮動的実験
湯村美紀, 宮森保紀, 大島俊之, 藤生重雄, 横川英彰, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, 2011

土木構造教育に関する企業アンケートについて
平沢秀之, 宮森保紀, 佐藤太裕, 渡辺力, 小室雅人, 三上修一, 栗橋祐介, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, 2011

スマートセンサーを用いた人道用吊橋の振動測定実験
坂和平, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, 2011

地域内物流分布を考慮した橋梁の社会的価値の検討
樅山哲也, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

振動計測のための耐低温環境用スマートセンサーシステムの開発
宮森保紀, 坂和平, 藤本正樹, 山崎智之, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

大学・高専の鋼構造関連科目に対する企業ニーズ調査について
平沢秀之, 宮森保紀, 佐藤太裕, 渡辺力, 小室雅人, 三上修一, 栗橋祐介, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

低温環境下における線形バネ供試体を用いたサブストラクチャ仮動的実験
宮森保紀, 湯村美紀, 園部司明, 山崎智之, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

異なる局部加振方法による橋梁構造の欠陥検出精度の検討
坪川良太, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

FRPトラス構造の接合部損傷検出のための振動特性の検討
追着昂志, 三上修一, 大島俊之, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 67, 2011

鉄道廃線橋梁を用いた局部加振法による損傷検出の研究
坪川良太, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 66th, 2011

低温環境下におけるワイヤレスセンサーの適用性と電力消費
坂和平, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

圧電アクチュエータの局部加振による実橋梁の微小欠陥検出に関する研究
坪川良太, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

BMSのための社会的サービス価値の研究
樅山哲也, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

低温環境下におけるサブストラクチャ仮動的試験システムの構築
宮森保紀, 湯村美紀, 高田昌延, 山崎智之, 三上修一, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

全国国立大学土木系コースのシラバス調査による構造系科目開講状況の現状分析
佐藤太裕, 宮森保紀, 栗橋祐介, 小室雅人, 平沢秀之, 渡辺力, 三上修一, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

全国主要大学と道内国立大学のシラバス調査による構造系科目開講状況の現状分析
佐藤太裕, 宮森保紀, 小室雅人, 平沢秀之, 渡辺力, 三上修一, 土木学会北海道支部論文報告集(CD-ROM), 66, 2010

局部振動加振によるFRPトラス接合部の損傷検出に関する研究
追着昂志, 三上修一, 大島俊之, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 66, 2010

常時微動計測による曲線鋼鈑桁橋の固有振動特性同定に関する一考察
宮森保紀, 湯村美紀, 坂和平, 山崎智之, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 66, 2010

局部振動加振によるFRPトラス接合部の損傷検出法に関する研究
追着昂志, 三上修一, 大島俊之, 宮森保紀, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 65th, 2010

廃止されたふるさと銀河線(旧池北線)におけるデッグガーダー橋の特徴
宮森保紀, 小林学, 山崎智之, 白川龍生, 三上修一, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 64th, Disk 2, 2009

橋梁用ゴム製緩衝材の効果と緩衝性能に関する研究
増田兼士, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 青地知也, 土木学会北海道支部論文報告集(CD-ROM), 65, 2009

鋼製支承の地震時の可動を考慮した実測データに基づく鋼斜張橋モデルの検討
木村浩士, 宮森保紀, 三上修一, 山崎智之, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 65, 2009

土木系学科における建築士受験資格等のキャリア形成支援体制の現状と今後の課題
宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 63rd, Disk 2, 2008

A CASE STUDY OF PROCESSING TIME IN REMOTE PSEUDODYNAMIC TESTS WITH SUBSTRUCTURING
宮森保紀, 坪田豊, 岩上隆志, 青山圭介, 平沢秀之, 鋼構造年次論文報告集, 16, 2008

FEMによる実橋梁のモデル化の検討と維持管理への適用
門田峰典, 大島俊之, 三上修一, 宮森保紀, 山崎智之, 土木学会北海道支部論文報告集(CD-ROM), 64, 2008

低温環境下における制震ダンパーの動的載荷実験
挾間藍, 宮森保紀, 藤生重雄, 宮崎充, 山崎智之, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 64, 2008

実測データに基づく鋼斜張橋モデルの構築と動的解析における非線形性の影響
木村浩士, 宮森保紀, 池田憲俊, 三上修一, 大島俊之, 土木学会北海道支部論文報告集(CD-ROM), 64, 2008

実測データに基づく鋼斜張橋モデルにおける鋼製可動支承の非線形性を考慮した地震時挙動
木村浩士, 宮森保紀, 三上修一, 山崎智之, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 63rd, Disk 1, 2008

Bridges in the Furusato Ginga Line (former Chihoku Line)
宮森 保紀, 白川 龍生, 山崎 智之, Historical studies in civil engineering, proceedings of the annual conference, 28, 161, 165, 2008
土木学会, Japanese

実測データに基づく斜張橋モデルにおける温度変化を考慮した場合の動的応答
木村浩士, 宮森保紀, 池田憲俊, 三上修一, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 62nd, Disk 1, 2007

低温環境下における制震ダンパーの正弦波動的載荷実験
挾間藍, 宮森保紀, 藤生重雄, 宮崎充, 大島俊之, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 62nd, Disk 1, 2007

北海道佐呂間町で発生した竜巻による甚大な災害に関する調査研究
田村幸雄, 新野宏, 石川裕彦, 佐々浩司, 鈴木修, 坪木和久, 藤吉康志, 前坂剛, 河井宏允, 植松康, 奥田泰雄, 曹曙陽, 遊馬芳雄, 大島俊之, 宮森保紀, 加藤輝之, 中里真久, 山内洋, 喜々津仁密, 村上知徳, 菊池浩利, 木村吉郎, 小林文明, 清水慎吾, 真木雅之, 岩波越, 三隅良平, 南慎一, 高橋章弘, 堤拓哉, 西村宏昭, 林泰一, 丸山敬, 山根悠介, 松井正宏, 吉田昭仁, 自然災害科学総合シンポジウム要旨集, 44th, 2007

低温環境下における制震ダンパーの地震波動的載荷実験
藤生重雄, 挾間藍, 宮森保紀, 宮崎充, 大島俊之, 山崎智之, 土木学会年次学術講演会講演概要集(CD-ROM), 62nd, Disk 1, 2007

ふるさと銀河線における橋梁のデータベース化と利用について
山崎智之, 大島俊之, 宮森保紀, 向井隆行, 挾間藍, 土木学会北海道支部論文報告集(CD-ROM), 63, 2007

セミアクティブ振動制御における可変粘性流体システムの適用性
小幡卓司, 角間恒, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 63, 2007

PERFORMANCE OF CONTROLLING SEISMIC DAMPER FOR BRIDGES AT LOW TEMPERATURE ENVIRONMENT
宮森保紀, 宮崎充, 藤生重雄, 山崎智之, 挾間藍, 大島俊之, 地震工学論文集(Web), 29, 2007

モニタリングデータに基づく地震時応答解析のための鋼斜張橋モデルの構築
池田憲俊, 宮森保紀, 大島俊之, 三上修一, 挟間藍, 土木学会年次学術講演会講演概要集(CD-ROM), 61st, Disk 1, 2006

A simulation model of a steel cable-stayed bridge based on monitoring data and its seismic response analysis
Ikeda Noritoshi, Miyamori Yasunori, Oshima Toshiyuki, Mikami Shuichi, Hasama Ai, 土木学会北海道支部論文報告集, 63, 63, 66, 2006
社団法人 土木学会, Japanese

A study on structural initial value of composite slab and the bridge with sloped webs
Kadota Takanori, Oshima Toshiyuki, Mikami Shuichi, Miyamori Yasunori, Mitamura Hiroshi, 土木学会北海道支部論文報告集, 63, 53, 56, 2006
社団法人 土木学会, Japanese

Study on Damage Evaluation of Steel Member by High-perforance laser displacement meter
Ikeda Takahiro, Oshima Toshiyuki, Mikami Shuichi, Miyamori Yasunori, Yamazaki Tomoyuki, 土木学会北海道支部論文報告集, 63, 13, 14, 2006
社団法人 土木学会, Japanese

斜張橋主塔への可変剛性型セミアクティブ振動制御の適用に関する一考察
池田憲俊, 宮森保紀, 小幡卓司, 三上修一, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 60th, Disk 1, 2005

画像処理技術を用いた非接触3次元変位測定システムについて
小幡卓司, 澤崎渉, 林川俊郎, 倉戸亮, 宮森保紀, 土木学会北海道支部論文報告集(CD-ROM), 61, 2005

地震時における動的不安定現象の発生に関する基礎的検討
清水晋作, 大塚久哲, 宮森保紀, 為広尚起, 土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 1, 2004

デジタル画像処理技術を応用した非接触多点変位計測システムについて
小幡卓司, 宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 2, 2004

Study on Establishment of BMS in Consideration of Damage Level, Life Expectancy and UC on Steel Bridges
小幡卓司, 倉戸亮, 林川俊郎, 宮森保紀, 鋼構造年次論文報告集, 12, 2004

地震防災ネットワークとしての札内清柳大橋のモニタリングについて
坪田豊, 宮森保紀, 大島俊之, 土木学会年次学術講演会講演概要集(CD-ROM), 59th, Disk 1, 2004

Continuous vibration monitoring on Satsunai Seiryu Bridge for structural health diagnostics
MIYAMORI Yasumori, TSUBOTA Yutaka, UCHIDA Yoshihiro, OSHIMA Toshiyuki, 土木学会北海道支部論文報告集, 61, 61, 5, 8, 2004
社団法人 土木学会, Japanese

A consideration of remote semi-active vibration control on steel towers by using digital image processing and TCP/IP protocol
MIYAMORI Yasunori, ADACHI Kazunori, OBATA Takashi, OTUKA Hisanori, Dynamics and Design Conference, 2003, 8, 374, 379, 30 Oct. 2003
Many vibration monitoring methods including remote monitoring are proposed for structural diagnostics or damage identification. And vibration control has been studied in order to maintain or improve structural performance. It is expected that the combination of remote vibration monitoring and vibration control have possibility to establish reasonable structural maintenance system. A low-cost remote displacement measuring system using PC camera and TCP/IP network is developed in this study. Property of the measuring system is examined in vibration measurement test. Moreover, semi-active vibration control experiments are performed on steel tower model by using proposed displacement system. From results of experiments, the remote vibration measuring system has basic applicability as sensor system of semi-active vibration control on tower structures., The Japan Society of Mechanical Engineers, Japanese

Developmental Study of Sound Monitoring System on Bridge Structures for Damage Identification
OBATA Takashi, ASAKA Yasuhiro, MIYAMORI Yasunori, HAYASHIKAWA Toshiro, SATO Koichi, Dynamics and Design Conference, 2003, 8, 405, 410, 30 Oct. 2003
Recently, long-lived active use of infrastructures has become a very important problem in all over the world. The damage identification of infrastructures is the effective technique for the maintenance and rehabilitation of bridges, tunnels and so on. The purpose of this study is to propose a sound monitoring system for bridges and investigate damage identification method by using sound monitoring data. The sound monitoring damage identification system in this study is constructed by using digital audio interface and dynamic microphone sensors. The damage identification method is fractal dimension analyses performed for damaged and non-damaged data, and the alteration of fractal dimensions is investigated. From results, the possibility of application for identifying bridge damage is discussed., The Japan Society of Mechanical Engineers, Japanese

PCカメラを用いた実時間遠隔変位計測システムの適用性に関する一考察
安達一憲, 宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 1, 2003

A consideration of remote vibration control by using digital image processing on steel towers
宮森保紀, 安達一憲, 小幡卓司, 鋼構造年次論文報告集, 11, 2003

塔状構造物の可変剛性・減衰型振動制御の適用に関する実験的研究
宮森保紀, 小幡卓司, 安達一憲, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集(CD-ROM), 58th, Disk 1, 2003

Developmental Study on Sound Monitoring Damage Identification System of Steel Bridge Structures
小幡卓司, 浅香康弘, 宮森保紀, 林川俊郎, 佐藤浩一, 鋼構造年次論文報告集, 11, 2003

Study on kinesiological walking force model for vibration serviceability assessment on pedestrian bridges
宮森保紀, 広岡勉, 小幡卓司, 林川俊郎, 佐藤浩一, 鋼構造年次論文報告集, 10, 2002

鋼橋の動的性能向上を目指したセミアクティブ交通振動制御の適用性について
鈴木隆, 宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002

非接触変位計測システムへの家庭用CCDカメラの適用に関する一考察
安達一憲, 宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002

音響モニタリングデータを用いた鋼橋の損傷同定について
植田康平, 小幡卓司, 林川俊郎, 佐藤浩一, 宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002

DEAを用いた橋梁構造物における環境負荷の定量的評価法について
高田詞之, 小幡卓司, 林川俊郎, 佐藤浩一, 宮森保紀, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002

断面性能可変型セミアクティブ制御の振動制御実験について
宮森保紀, 安達一憲, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集(CD-ROM), 57th, 2002

損傷を受けた橋梁構造物のヘルスモニタリング手法に関する一考察
小幡卓司, 林川俊郎, 佐藤浩一, 三田知幸, 宮森保紀, 土木学会年次学術講演会講演概要集 第1部, 56th, A, 2001

外ケーブルを用いた橋梁構造物の可変剛性型セミアクティブ制御に関する一考察
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 鈴木隆, 土木学会年次学術講演会講演概要集 第1部, 56th, A, 2001

Study on Damage Identification of Steel Bridge Structures based on Characteristic of 1/f noise.
小幡卓司, 植田康平, 林川俊郎, 佐藤浩一, 宮森保紀, 鋼構造年次論文報告集, 9, 2001

Study on Applicability of Analytic Hierarchy Process to Bridge Management System of Steel Bridges.
小幡卓司, 林川俊郎, 佐藤浩一, 木村竜太, 宮森保紀, 鋼構造年次論文報告集, 9, 2001

Study on Semi-Active Vibration Control on Bridge Structures by using External Cable System.
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 鈴木隆, 鋼構造年次論文報告集, 9, 2001

塔状構造物のセミアクティブ制御における制振効率について
小幡卓司, 鈴木隆, 林川俊郎, 佐藤浩一, 宮森保紀, 土木学会北海道支部論文報告集, 56A, 2000

損傷を有する人道橋の振動使用性に関する一考察
戸借誠治, 川上江佐夫, 松井義孝, 林川俊郎, 小幡卓司, 宮森保紀, 土木学会北海道支部論文報告集, 56A, 2000

ケーブル構造物における可変減衰型セミアクティブ制御の適用性について
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会北海道支部論文報告集, 56A, 2000

ケーブル構造物における可変減衰型セミアクティブ制御に関する一考察
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集 第1部, 55th, B, 2000

Consideration of Applicability for Damage Identification Steel Bridges by using of Sound data.
小幡卓司, 植田康平, 林川俊郎, 佐藤浩一, 宮森保紀, 鋼構造年次論文報告集, 8, 2000

Study on Applicability of Analytic Hierarchy Process for Bridge Repair Planning Problems.
小幡卓司, 林川俊郎, 佐藤浩一, 浜木道大, 宮森保紀, 鋼構造年次論文報告集, 8, 2000

可変減衰型セミアクティブ制御によるケーブル構造物の動的挙動　　　　　　　　　　　　　　　
鋼構造年次論文報告集, 8, 103, 108, 2000

可変減衰型セミアクティブ制御の鋼製タワーにおける適用性　　　　　　　　　　　　　　　
鋼構造年次論文報告集, 8, 97, 102, 2000

Study on Dynamic Characteristics of Cable Structures by using Variable Damping Semi-Active Control
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, 鈴木隆, Journal of Constructional Steel, 8, 103, 108, 2000

Study on Applicability of Variable Damping Semi-Active Control on Steel Towers
宮森保紀, 小幡卓司, 鈴木隆, 林川俊郎, 佐藤浩一, Journal of Constructional Steel, 8, 97, 102, 2000

Experimental Study on Applicability of Adjustable Stiffness System on Cable Structures.
小幡卓司, 井上圭介, 宮森保紀, 林川俊郎, 佐藤浩一, 土木学会北海道支部論文報告集, 55A(1998), 1999

Study of Dynamic Response Characteristics on Pedestrian Bridges by Using Human Walking Models.
小幡卓司, 能登潤一郎, 林川俊郎, 佐藤浩一, 宮森保紀, 土木学会北海道支部論文報告集, 55A(1998), 1999

Consideration on Applicability of Fuzzy Control Theory on Adjustable Stiffness System.
小幡卓司, 宮森保紀, 井上圭介, 林川俊郎, 佐藤浩一, 土木学会北海道支部論文報告集, 55A(1998), 1999

歩道橋の動的応答性状に基づいた人型歩行モデルの同定について
小幡卓司, 林川俊郎, 佐藤浩一, 能登潤一郎, 宮森保紀, 土木学会年次学術講演会講演概要集 第1部, 54th, B, 1999

Applicatbility of Fuzzy Control Theory on Active Vibration Control by Using Adjustable Stiffness System.
小幡卓司, 林川俊郎, 佐藤浩一, 井上圭介, 宮森保紀, 日本機械学会運動と振動の制御シンポジウム講演論文集, 6th, 1999

ケーブル構造物におけるアクティブ剛性型制振システムの評価方法について
井上圭介, 小幡卓司, 宮森保紀, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集 第1部, 54th, B, 1999

アクティブ剛性型制振システムにおける制御効率について
小幡卓司, 宮森保紀, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集 第1部, 54th, B, 1999

歩道橋の応答特性に基づいた人型歩行モデルの同定に関する研究　　　　　　　　　　　　　　　
鋼構造年次論文報告集, 7, 103, 108, 1999

Identification of Human Walking Model Based on Dynamic Characteristics of Pedestrian Bridges
宮森保紀, 小幡卓司, 林川俊郎, 佐藤浩一, Journal of Constructional Steel, 7, 103, 108, 1999

Applicability of Fuzzy Control Theory on Active Vibration Control by Using Adjustable Stiffness System.
小幡卓司, 井上圭介, 宮森保紀, 林川俊郎, 佐藤浩一, 土木学会北海道支部論文報告集, 54A(1997), 1998

Experimental research on application of Fuzzy control theory to variable rigidity active damping system.
井上圭介, 小幡卓司, 宮森保紀, 林川俊郎, 佐藤浩一, 土木学会年次学術講演会講演概要集 第1部, 53rd, B, 1998

2018年北海道胆振東部地震・大阪府北部の地震被害調査報告書
土木学会, 土木学会地震工学委員会, 土木学会地震工学委員会地震被害調査小委員会
土木学会,丸善出版(発売), Sep. 2019, 9784810610048, 372, 73p, Japanese, Report, [Peer-reviewed], [Joint editor]

Wireless sensor networks for civil infrastructure monitoring: a best practice guide
David Rodenas-Herráiz, Kenichi Soga, Paul R A Fidler, Nicholas de Battista, Ainonai pedestrian overpass (Japan)
ICE Publishing, Jul. 2016, 9780727761514, 210, 6, English, Scholarly book, Wireless Sensor Networks for Civil Infrastructure Monitoring provides expert guidance on the selection and use of wireless sensor network (WSN) technology for the structural monitoring of both existing infrastructure and new construction projects. The purpose of this guide is to consolidate a generic methodology for the design and implementation of WSNs for monitoring civil engineering infrastructure, coupled with best practice for data management and information valuation., ［Internationally co-authored］, 40285960, [Contributor]

センシング情報社会基盤
土木学会構造工学委員会センシングと情報社会基盤研究小委員会, 土木学会
土木学会,丸善出版 (発売), Mar. 2015, 9784810608762, 298p, Japanese, Scholarly book, [Peer-reviewed], [Joint editor]

歩道橋の設計ガイドライン
土木学会構造工学委員会歩道橋の設計ガイドラインに関する研究小委員会, 国際コンクリート連合, 土木学会
土木学会,丸善 (発売), Jan. 2011, 9784810607147, xvii, 324p, Japanese, Scholarly book, ［Internationally co-authored］, [Peer-reviewed]

実践建設系アセットマネジメント : 補修事業計画の立て方と進め方
大島, 俊之
森北出版, Oct. 2009, 9784627452411, vi, 206p, Japanese, Textbook, [Contributor]

モニタリングによる橋梁の性能評価指針〈案〉 (構造工学シリーズ (16))
土木学会構造工学委員会橋梁振動モニタリングとその標準化小委員会, 中島, 章典
土木学会, 01 Jun. 2006, 4810605345, 85, Japanese, Scholarly book, [Peer-reviewed], [Contributor]

Dec. 2017 - Present
International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII)　　　　　　　　　　　　　　　

Sep. 1998 - Present
Japan Society of Civil Engineers　　　　　　　　　　　　　　　

Structural performance evaluation of real civil infrastructure by merging dense point cloud data into FE analysis
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
01 Apr. 2021 - 31 Mar. 2024
宮森 保紀
本研究は鋼構造物を対象として、設計図書などに基づき構築されたFEMモデルに、供用中の実構造物の損傷部分を撮影して得られた点群モデルを融合させ、損傷を受けた実構造物のFEMモデルを構築し、実構造物の性能評価が高精度に可能な方法を創出する。
橋梁の設計では有限要素法（Finite Element Method）による構造解析が一般化したが、供用中の構造性能の評価でFEMを用いることはほとんどない。一方、実構造物を撮影した画像データを用いて近接目視点検を代替する取り組みが進んでいるが、応力状態の把握など構造性能の定量的評価はできない。そこで本研究では両者を融合させ、構造物のライフサイクルに一貫して適用可能な数値モデル構築手法を開発する。
具体的には、損傷を受けた構造物の保有性能を定量的に評価するため、健全部を含む構造全体は従来のFEMでモデル化し、損傷を受けた部分のみ撮影画像から高密度点群モデルを構築し損傷部分の節点座標を得る。この損傷部分の節点座標を構造全体のFEMモデルに取り込み、損傷部分の応力状態を評価可能なFEMモデルを構築する方法を開発する。
2021年度は、鋼橋を対象に損傷部材を精度よく高密度点群モデルにする方法の確立に取り組んだ。具体的には撮影角度や距離、被写体の照度を変えながら、モデル化の精度を検討した。次に撮影した画像から3次元点群モデルを構築し、FEMモデルへの変換を行うが、2021年度は、FEMモデルへの変換に際して、より汎用性の高いファイル形式へ対応させる変更を行うとともに、要素構築手法を見直し、要素の欠損を低減する手法を開発した。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 21K04230

Direct transform from dense point cloud data to finite element model for structural analysis
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
01 Apr. 2018 - 31 Mar. 2021
Miyamori Yasunori
We developed a method for quantitatively evaluating the structural performance of existing civil infrastructures. We firstly constructed a dense point cloud model from images taken with a digital camera, which is so dense that even thickness changes of steel structural members can be detected. And then the dense point cloud model was converted into a FEM model that can be used for structural analysis. From a large number of digital images, a point cloud model is created using SfM, and solid elements for FEM analysis were created and stress analysis is performed.
In the feasible study, laboratory-scale specimens and large actual scale structures were chosen. Steel members of experimental structures could be modeled in 2% error. In FE structural analysis, the distribution of stress was reproduced following the compatible FE model established by the common method.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 18K04317

Research and development of a low-cost, widespread measurement system for remote diagnosis of damaged bridges in snowy and cold regions
A-STEP
Sep. 2019 - Mar. 2021
宮森保紀, 三上 修一, 日向洋一, 今泉宜人
H28北海道豪雨など、広大な寒冷地で被災した橋梁の安全管理を長期間安定的に行う計測システムの開発が課題である。課題解決には、廉価かつ温度変化などの影響を受けない高精度の測定システムとデータを遠隔地から安定して送受信できる通信システムが必要であり、計測・安全装置の開発企業と低温でのインフラ監視の知見と大規模屋外実験場などの大学のシーズを結びつける。また、橋梁の安全管理には適切な安全閾値を過去の被災例や大規模試験場の実験、FEM解析などに基づいて工学的に決定する必要もあり、インフラの維持を行ってきた企業の経験と大学の学術的な知見を結びつけ、道路管理者が導入しやすいシステムとして事業化を目指す。
JST, Kitami Institute of Technology, Principal investigator, Competitive research funding, 19197825

Research and development of a measurement system that enables remote diagnosis of bridges in communication-deficient areas during snowy and cold weather
イノベーション創出 研究支援事業（スタートアップ研究補助金）
Aug. 2019 - Mar. 2020
宮森保紀, 三上修一, 日向洋一, 今泉宜人
北海道科学技術総合振興センター（ノーステック財団）, Kitami Institute of Technology, Principal investigator, Competitive research funding

Comprehensive study on the 2018 Hokkaido Eastern Iburi Earthquake and its disaster
Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes
04 Oct. 2018 - 31 Mar. 2019
Takahashi Hiroaki
Comprehensive investigation on the 2018 Hokkaido Eastern Iburi earthquake and its disaster was conducted. Mainshock rupture initiated at deepest part and major slip was occurred in 20-30km deep. Multiple simultaneous landslides in Atsuma town was induced by combination of strong ground shaking and weak sliding layer between pyroclastic fall deposit layers. Halloysite cray minerals was discovered in all sliding layers. Simulation suggested landslides might attack residential houses within 6 seconds. Observed peak ground motions in nearby area were larger than common distance attenuation model. Severe wooden house damage in Mukawa town was due to amplified seismic waves due to site effects. Sounding and boring investigation revealed filled low-density volcanic ash and higher groundwater level in liquefaction area. Electricity blackout caused severe damage in social and economic activities of Hokkaido. These scientific outcomes were explained to residents at public briefing session.
Japan Society for the Promotion of Science, Grant-in-Aid for Special Purposes, Hokkaido University, 18K19952

Hybrid damage detecting method with high density modal idenntification and thermographic examination of infrastructural system
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
01 Apr. 2015 - 31 Mar. 2018
Miyamori Yasunori
To realize structural health monitoring using vibration measurement data, even though the structure keeps intact condition, its dynamic characteristics fluctuate due to the influence of temperature and other environmental conditions. Therefore, in this study, vibration measurement was carried out on concrete specimens and actual bridge, and it was confirmed that the change of the vibration characteristics by internal temperature is important for identifying structural damages. In particular, in the prestressed concrete specimen, effects of both temperature change and cracks of concrete member was examined. As a result, the vibration characteristics change caused by large damage exceeds the effect of the temperature change while temperature effects is still large for small damaged or intact structure. In addition, it was also found that the measured value fluctuated greatly in the temperature measurement of the thermographic camera in the real environment.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Kitami Institute of Technology, 15K06176

Research and development of high-resolution reproducible 3D models by robot photography and implementation in society
エネルギー・環境新技術先導プログラム
Apr. 2017 - Mar. 2018
與那覇誠, 堀田修平, 小野修司, 菊池浩明, 山崎文敬, 向井朗, 吉葉寛一, 高野敏之, 小山一人, 洞口克彦, 宮森保紀, 泉保則, 早川吉彦
１ 社会インフラを初めとする国内高度成長期に建設した多くの建造物の約半分が2030年度に築後50年以上と言われている。これらの維持・管理費用は6兆円(2020年)、１0兆円(2030年)と推定され、国家財政圧迫が懸念されている。一方、少子高齢化傾向の進行で維持、管理技術を保有する熟練技術者が不足も懸念されている。
２ 一方、少子高齢化傾向の進行で維持、管理技術を保有する熟練技術者が不足が懸念されている。社会インフラを構成する構造物(橋梁、トンネル、ダム、港湾等)の設計・施工・維持・管理の電子的一元化を目指する。 特に、電子化が遅れている維持・管理についての設計・施工から一貫した建造物の管理を実現する為の研究を行う。
3 その上で、下記の二点を実施する(1) 電子的一元化の中で、最もIT化、電子化が必要な維持管理(特に再利用可能な点検データの取得)について橋梁にフォーカスした研究を行う
(2) 2030年に向けた課題・達成シナリオ、ビジネスモデル、社会実装等の5カ年計画提案を行う専門委員会に設置と運営
１）点検技術者の高齢化、減少、進歩する技術の積極的適用の具体化
２）予算上の問題 等が待ち受ける地方での社会実装と実施に向けた重要5課題の抽出と解決スケジュール立案
NEDO, Kitami Institute of Technology, Competitive research funding, 17934302

Structural health monitoring of bridges with high density smart sensor array
Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
01 Apr. 2013 - 31 Mar. 2015
MIYAMORI Yasunori
A vibration based Structural Health Monitoring (SHM) is expected to be a key technique to improve structural safety. A smart sensor which is an electronic device using MEMS (Micro Electro Mechanical Systems) has a potential to enable efficient vibration measurement because of its wireless communication function and on-board processing ability.
In this study, vibration measurement experiments on real bridges were performed to establish the working knowledge of smart sensor system and the damage identification method which was proposed in this study. The experiments were performed on a damaged pedestrian bridge. From experimental results, mode shapes slightly changed through repair work though its natural frequencies did not change. The largest value of a proposed damage index was obtained at the sensor near the damaged point.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Kitami Institute of Technology, 25870025

Smart sensor-based bridge health monitoring system to detect deterioration of bridges
Aug. 2012 - Feb. 2013
宮森保紀
北海道科学技術総合振興センター（ノーステック財団）, 若手研究人材育成事業（若手研究人材・ネットワーク育成補助金（Talent補助金））, Principal investigator, Competitive research funding

Feasible study of smart sensors for structural health monitoring by using old steel railway bridges.
Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
2009 - 2010
MIYAMORI Yasunori
Smart sensor system which has radio transmission and data processing capacity is expected to be applied for structural health monitoring for bridge or other infrastructures. In this study, applicability of the sensor system is tested in testbed. The system needs energy harvesting system for long term use under severe environment. The developed system is tested in a cold room and real bridge testbed.
Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Kitami Institute of Technology, 21710166

構造物の自動化健全度診断システムの開発と廃橋梁群を利用した実規模実験環境の構築
科学研究費助成事業 特別研究員奨励費
2008 - 2008
宮森 保紀, BESKHYROUN S. F.
日本学術振興会, 特別研究員奨励費, 北見工業大学, 08F08390

低温仮動的試験システムの開発と免震橋梁の低温地震応答特性の解明
科学研究費助成事業 若手研究(B)
2006 - 2007
宮森 保紀
地震時における低温環境下特有の諸現象を解明するためのハイブリッド型実験システムを開発した。この実験システムは橋梁や建物などの地震時挙動を検討する際に、解析対象を構造実験部分と数値実験部分に分割し、部材の挙動が数値モデル化できる部分は数値実験を、部材の挙動を実験的に明らかにする必要がある部分については構造実験を行うものである。このような実験手法はこれまで多くの成果が報告されているが、寒冷環境下で実験環境を構築した例はない。寒冷環境下では常温と比較してゴム支承、鋼部材、表層地盤などの特性が変化することが知られているが、これまでは部材単体としての検討にとどまり、構造全体として地震時の応答を実験的に明らかにした例はない。このような寒冷地に特徴的な現象を解明し地震被害を軽減することは、均衡ある国土の安全性の確保に貢献するともに、北方圏のエネルギー産出地の安全性向上に寄与する。
本研究では、具体的には米国イリノイ大学で開発されたソフトウェア群(UI-SIMCOR)を応用し、これを北見工業大学が保有する低温域材料・構造実験システムに適用することで低温サブストラクチャ仮動的試験システムの構築を行う。計算部分と実験部分の制御を行うサーバを構築し、動作検証を行う小型模型実験装置を製作した前年度に引き続きシステムの改修を行った。具体的には共同利用のため学外に計算部分を設けた場合にも対応できるよう新たなサーバの構築とネットワーク環境の整備を行った。実験部分は低温域材料・構造実験システムに接続するためのシステム改修を行ったが、システム改修の過程でUI-SIMCORの最新版が配布されたため、将来の拡張性を考慮して対応に着手した。対応完了後、低温構造実験システムを利用した制震装置を有する橋梁のハイブリッド実験を実施する。
日本学術振興会, 若手研究(B), 北見工業大学, 18760341